diff --git a/media/Android.bp b/media/Android.bp
index ce62b03d84b76..7592c15ec5347 100644
--- a/media/Android.bp
+++ b/media/Android.bp
@@ -55,12 +55,18 @@ aidl_interface {
         "aidl/android/media/audio/common/AudioChannelLayout.aidl",
         "aidl/android/media/audio/common/AudioConfig.aidl",
         "aidl/android/media/audio/common/AudioConfigBase.aidl",
+        "aidl/android/media/audio/common/AudioContentType.aidl",
+        "aidl/android/media/audio/common/AudioEncapsulationMetadataType.aidl",
         "aidl/android/media/audio/common/AudioEncapsulationMode.aidl",
+        "aidl/android/media/audio/common/AudioEncapsulationType.aidl",
         "aidl/android/media/audio/common/AudioFormatDescription.aidl",
         "aidl/android/media/audio/common/AudioFormatType.aidl",
+        "aidl/android/media/audio/common/AudioMode.aidl",
         "aidl/android/media/audio/common/AudioOffloadInfo.aidl",
+        "aidl/android/media/audio/common/AudioSource.aidl",
         "aidl/android/media/audio/common/AudioStreamType.aidl",
         "aidl/android/media/audio/common/AudioUsage.aidl",
+        "aidl/android/media/audio/common/AudioUuid.aidl",
         "aidl/android/media/audio/common/PcmType.aidl",
     ],
     stability: "vintf",
diff --git a/media/aidl/android/media/audio/common/AudioContentType.aidl b/media/aidl/android/media/audio/common/AudioContentType.aidl
new file mode 100644
index 0000000000000..50ac181adcb2b
--- /dev/null
+++ b/media/aidl/android/media/audio/common/AudioContentType.aidl
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.media.audio.common;
+
+/**
+ * Content type specifies "what" is playing. The content type expresses the
+ * general category of the content: speech, music, movie audio, etc.
+ * This enum corresponds to AudioAttributes.CONTENT_TYPE_* constants in the SDK.
+ *
+ * {@hide}
+ */
+@Backing(type="int")
+@VintfStability
+enum AudioContentType {
+    /**
+     * Content type value to use when the content type is unknown, or other than
+     * the ones defined.
+     */
+    UNKNOWN = 0,
+    /**
+     * Content type value to use when the content type is speech.
+     */
+    SPEECH = 1,
+    /**
+     * Content type value to use when the content type is music.
+     */
+    MUSIC = 2,
+    /**
+     * Content type value to use when the content type is a soundtrack,
+     * typically accompanying a movie or TV program.
+     */
+    MOVIE = 3,
+    /**
+     * Content type value to use when the content type is a sound used to
+     * accompany a user action, such as a beep or sound effect expressing a key
+     * click, or event, such as the type of a sound for a bonus being received
+     * in a game. These sounds are mostly synthesized or short Foley sounds.
+     */
+    SONIFICATION = 4,
+}
diff --git a/media/aidl/android/media/audio/common/AudioEncapsulationMetadataType.aidl b/media/aidl/android/media/audio/common/AudioEncapsulationMetadataType.aidl
new file mode 100644
index 0000000000000..e0b272c85b307
--- /dev/null
+++ b/media/aidl/android/media/audio/common/AudioEncapsulationMetadataType.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.media.audio.common;
+
+/**
+ * Enumeration of metadata types permitted for use by encapsulation mode audio
+ * streams (see AudioEncapsulationMode). This type corresponds to
+ * AudioTrack.ENCAPSULATION_METADATA_TYPE_* constants in the SDK.
+ *
+ * {@hide}
+ */
+@Backing(type="int")
+@VintfStability
+enum AudioEncapsulationMetadataType {
+    /** Default value. */
+    NONE = 0,
+    /**
+     * Encapsulation metadata type for framework tuner information.
+     */
+    FRAMEWORK_TUNER = 1,
+    /**
+     * Encapsulation metadata type for DVB AD descriptor.
+     *
+     * This metadata is formatted per ETSI TS 101 154 Table E.1: AD_descriptor.
+     */
+    DVB_AD_DESCRIPTOR = 2,
+}
diff --git a/media/aidl/android/media/audio/common/AudioEncapsulationType.aidl b/media/aidl/android/media/audio/common/AudioEncapsulationType.aidl
new file mode 100644
index 0000000000000..9e80bd6757600
--- /dev/null
+++ b/media/aidl/android/media/audio/common/AudioEncapsulationType.aidl
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media.audio.common;
+
+/**
+ * Audio encapsulation type is used to describe if the audio data should be sent
+ * with a particular encapsulation type or not. This enum corresponds to
+ * AudioProfile.AUDIO_ENCAPSULATION_* constants in the SDK.
+ *
+ * {@hide}
+ */
+@Backing(type="int")
+@VintfStability
+enum AudioEncapsulationType {
+    /** No encapsulation type is specified. */
+    NONE = 0,
+    /** Encapsulation used the format defined in the standard IEC 61937. */
+    IEC61937 = 1,
+}
diff --git a/media/aidl/android/media/audio/common/AudioMode.aidl b/media/aidl/android/media/audio/common/AudioMode.aidl
new file mode 100644
index 0000000000000..cc03813776e86
--- /dev/null
+++ b/media/aidl/android/media/audio/common/AudioMode.aidl
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.media.audio.common;
+
+/**
+ * Major modes for a mobile device. The current mode setting affects audio
+ * routing.
+ *
+ * {@hide}
+ */
+@Backing(type="int")
+@VintfStability
+enum AudioMode {
+    /**
+     * Used as default value in parcelables to indicate that a value was not
+     * set. Should never be considered a valid setting, except for backward
+     * compatibility scenarios.
+     */
+    SYS_RESERVED_INVALID = -2,
+    /**
+     * Value reserved for system use only. HALs must never return this value to
+     * the system or accept it from the system.
+     */
+    SYS_RESERVED_CURRENT = -1,
+    /** Normal mode (no call in progress). */
+    NORMAL = 0,
+    /** Mobile device is receiving an incoming connection request. */
+    RINGTONE = 1,
+    /** Calls handled by the telephony stack (PSTN). */
+    IN_CALL = 2,
+    /** Calls handled by apps (VoIP). */
+    IN_COMMUNICATION = 3,
+    /** Call screening in progress. */
+    CALL_SCREEN = 4,
+}
diff --git a/media/aidl/android/media/audio/common/AudioSource.aidl b/media/aidl/android/media/audio/common/AudioSource.aidl
new file mode 100644
index 0000000000000..527ee39b3267f
--- /dev/null
+++ b/media/aidl/android/media/audio/common/AudioSource.aidl
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.media.audio.common;
+
+/**
+ * Defines the audio source. An audio source defines both a default physical
+ * source of audio signal, and a recording configuration. This enum corresponds
+ * to MediaRecorder.AudioSource.* constants in the SDK.
+ *
+ * {@hide}
+ */
+@Backing(type="int")
+@VintfStability
+enum AudioSource {
+    /**
+     * Used as default value in parcelables to indicate that a value was not
+     * set. Should never be considered a valid setting, except for backward
+     * compatibility scenarios.
+     */
+    SYS_RESERVED_INVALID = -1,
+    /** Default audio source. */
+    DEFAULT = 0,
+    /** Microphone audio source. */
+    MIC = 1,
+    /** Voice call uplink (Tx) audio source. */
+    VOICE_UPLINK = 2,
+    /** Voice call downlink (Rx) audio source. */
+    VOICE_DOWNLINK = 3,
+    /** Voice call uplink + downlink (duplex) audio source. */
+    VOICE_CALL = 4,
+    /**
+     * Microphone audio source tuned for video recording, with the same
+     * orientation as the camera if available.
+     */
+    CAMCORDER = 5,
+    /** Microphone audio source tuned for voice recognition. */
+    VOICE_RECOGNITION = 6,
+    /**
+     * Microphone audio source tuned for voice communications such as VoIP. It
+     * will for instance take advantage of echo cancellation or automatic gain
+     * control if available.
+     */
+    VOICE_COMMUNICATION = 7,
+    /**
+     * Audio source for a submix of audio streams to be presented remotely. An
+     * application can use this audio source to capture a mix of audio streams
+     * that should be transmitted to a remote receiver such as a Wifi display.
+     * While recording is active, these audio streams are redirected to the
+     * remote submix instead of being played on the device speaker or headset.
+     */
+    REMOTE_SUBMIX = 8,
+    /**
+     * Microphone audio source tuned for unprocessed (raw) sound if available,
+     * behaves like DEFAULT otherwise.
+     */
+    UNPROCESSED = 9,
+    /**
+     * Source for capturing audio meant to be processed in real time and played
+     * back for live performance (e.g karaoke). The capture path will minimize
+     * latency and coupling with playback path.
+     */
+    VOICE_PERFORMANCE = 10,
+    /**
+     * Source for an echo canceller to capture the reference signal to be
+     * canceled. The echo reference signal will be captured as close as
+     * possible to the DAC in order to include all post processing applied to
+     * the playback path.
+     */
+    ECHO_REFERENCE = 1997,
+    /** Audio source for capturing broadcast FM tuner output. */
+    FM_TUNER = 1998,
+    /**
+     * A low-priority, preemptible audio source for for background software
+     * hotword detection. Same tuning as VOICE_RECOGNITION.
+     */
+    HOTWORD = 1999,
+}
diff --git a/media/aidl/android/media/audio/common/AudioStreamType.aidl b/media/aidl/android/media/audio/common/AudioStreamType.aidl
index 1fa3a9cb46a14..e7f2961f75929 100644
--- a/media/aidl/android/media/audio/common/AudioStreamType.aidl
+++ b/media/aidl/android/media/audio/common/AudioStreamType.aidl
@@ -37,8 +37,11 @@ enum AudioStreamType {
      * Indicates that the operation is applied to the "default" stream
      * in this context, e.g. MUSIC in normal device state, or RING if the
      * phone is ringing.
+     *
+     * Value reserved for system use only. HALs must never return this value to
+     * the system or accept it from the system.
      */
-    DEFAULT = -1,
+    SYS_RESERVED_DEFAULT = -1,
     /** Used to identify the volume of audio streams for phone calls. */
     VOICE_CALL = 0,
     /** Used to identify the volume of audio streams for system sounds. */
diff --git a/media/aidl/android/media/audio/common/AudioUuid.aidl b/media/aidl/android/media/audio/common/AudioUuid.aidl
new file mode 100644
index 0000000000000..f2715ff498e6c
--- /dev/null
+++ b/media/aidl/android/media/audio/common/AudioUuid.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.media.audio.common;
+
+/**
+ * Commonly used structure for passing unique identifiers (UUID).
+ * For the definition of UUID, refer to ITU-T X.667 spec.
+ *
+ * {@hide}
+ */
+@JavaDerive(equals=true, toString=true)
+@VintfStability
+parcelable AudioUuid {
+    int timeLow;
+    int timeMid;
+    int timeHiAndVersion;
+    int clockSeq;
+    byte[] node; // Length = 6
+}
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioContentType.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioContentType.aidl
new file mode 100644
index 0000000000000..3798b8253766e
--- /dev/null
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioContentType.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.media.audio.common;
+/* @hide */
+@Backing(type="int") @VintfStability
+enum AudioContentType {
+  UNKNOWN = 0,
+  SPEECH = 1,
+  MUSIC = 2,
+  MOVIE = 3,
+  SONIFICATION = 4,
+}
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioEncapsulationMetadataType.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioEncapsulationMetadataType.aidl
new file mode 100644
index 0000000000000..0ee0dbb0d8c31
--- /dev/null
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioEncapsulationMetadataType.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.media.audio.common;
+/* @hide */
+@Backing(type="int") @VintfStability
+enum AudioEncapsulationMetadataType {
+  NONE = 0,
+  FRAMEWORK_TUNER = 1,
+  DVB_AD_DESCRIPTOR = 2,
+}
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioEncapsulationType.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioEncapsulationType.aidl
new file mode 100644
index 0000000000000..8a31fc4eb61cd
--- /dev/null
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioEncapsulationType.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.media.audio.common;
+/* @hide */
+@Backing(type="int") @VintfStability
+enum AudioEncapsulationType {
+  NONE = 0,
+  IEC61937 = 1,
+}
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioMode.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioMode.aidl
new file mode 100644
index 0000000000000..8ae1c10fccf58
--- /dev/null
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioMode.aidl
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.media.audio.common;
+/* @hide */
+@Backing(type="int") @VintfStability
+enum AudioMode {
+  SYS_RESERVED_INVALID = -2,
+  SYS_RESERVED_CURRENT = -1,
+  NORMAL = 0,
+  RINGTONE = 1,
+  IN_CALL = 2,
+  IN_COMMUNICATION = 3,
+  CALL_SCREEN = 4,
+}
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioSource.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioSource.aidl
new file mode 100644
index 0000000000000..d1dfe416d692e
--- /dev/null
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioSource.aidl
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.media.audio.common;
+/* @hide */
+@Backing(type="int") @VintfStability
+enum AudioSource {
+  SYS_RESERVED_INVALID = -1,
+  DEFAULT = 0,
+  MIC = 1,
+  VOICE_UPLINK = 2,
+  VOICE_DOWNLINK = 3,
+  VOICE_CALL = 4,
+  CAMCORDER = 5,
+  VOICE_RECOGNITION = 6,
+  VOICE_COMMUNICATION = 7,
+  REMOTE_SUBMIX = 8,
+  UNPROCESSED = 9,
+  VOICE_PERFORMANCE = 10,
+  ECHO_REFERENCE = 1997,
+  FM_TUNER = 1998,
+  HOTWORD = 1999,
+}
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioStreamType.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioStreamType.aidl
index cbca6c5364e24..bcfd374cb2049 100644
--- a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioStreamType.aidl
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioStreamType.aidl
@@ -36,7 +36,7 @@ package android.media.audio.common;
 @Backing(type="int") @VintfStability
 enum AudioStreamType {
   INVALID = -2,
-  DEFAULT = -1,
+  SYS_RESERVED_DEFAULT = -1,
   VOICE_CALL = 0,
   SYSTEM = 1,
   RING = 2,
diff --git a/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioUuid.aidl b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioUuid.aidl
new file mode 100644
index 0000000000000..af307dadf3a36
--- /dev/null
+++ b/media/aidl_api/android.media.audio.common.types/current/android/media/audio/common/AudioUuid.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.media.audio.common;
+/* @hide */
+@JavaDerive(equals=true, toString=true) @VintfStability
+parcelable AudioUuid {
+  int timeLow;
+  int timeMid;
+  int timeHiAndVersion;
+  int clockSeq;
+  byte[] node;
+}