Add Radio Interface Capabilities

* Introduces a set of capabilities specific for the radio interface
that are determined by the vendor and are then surfaced through
TelephonyManager.
* There are no capabilities yet defined and will come later in S

Test: Added cts, ran cts, and telephony tests
Bug: 163085807
Change-Id: I56713e05cbd5200baa2a3bc79f7f4b0d580ad2a1

telephony/java/android/telephony/RadioInterfaceCapabilities.java

@@ -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.telephony;
+
+import android.util.ArraySet;
+
+/**
+ * Contains the set of supported capabilities that the Radio Interface supports on this device.
+ *
+ * @hide
+ */
+public class RadioInterfaceCapabilities {
+
+    private final ArraySet<String> mSupportedCapabilities;
+
+
+    public RadioInterfaceCapabilities() {
+        mSupportedCapabilities = new ArraySet<>();
+    }
+
+    /**
+     * Marks a capability as supported
+     *
+     * @param capabilityName the name of the capability
+     */
+    public void addSupportedCapability(
+            @TelephonyManager.RadioInterfaceCapability String capabilityName) {
+        mSupportedCapabilities.add(capabilityName);
+    }
+
+    /**
+     * Whether the capability is supported
+     *
+     * @param capabilityName the name of the capability
+     */
+    public boolean isSupported(String capabilityName) {
+        return mSupportedCapabilities.contains(capabilityName);
+    }
+}

telephony/java/android/telephony/TelephonyManager.java

@@ -14209,4 +14209,39 @@ public class TelephonyManager {
 
         return Collections.emptyList();
     }
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = {"RADIO_INTERFACE_CAPABILITY_"},
+            value = {})
+    public @interface RadioInterfaceCapability {}
+
+    /**
+     * Whether the device supports a given capability on the radio interface.
+     *
+     * If the capability is not in the set of radio interface capabilities, false is returned.
+     *
+     * @param capability the name of the capability to check for
+     * @return the availability of the capability
+     *
+     * @hide
+     */
+    public boolean isRadioInterfaceCapabilitySupported(
+            @NonNull @RadioInterfaceCapability String capability) {
+        try {
+            if (capability == null) return false;
+
+            ITelephony telephony = getITelephony();
+            if (telephony != null) {
+                return telephony.isRadioInterfaceCapabilitySupported(capability);
+            } else {
+                throw new IllegalStateException("telephony service is null.");
+            }
+        } catch (RemoteException ex) {
+            if (!isSystemProcess()) {
+                ex.rethrowAsRuntimeException();
+            }
+        }
+        return false;
+    }
 }

telephony/java/com/android/internal/telephony/ITelephony.aidl

@@ -2249,4 +2249,12 @@ interface ITelephony {
      * @return CarrierBandwidth with bandwidth of both primary and secondary carrier.
      */
     CarrierBandwidth getCarrierBandwidth(int subId);
+
+    /**
+     * Checks whether the device supports the given capability on the radio interface.
+     *
+     * @param capability the name of the capability
+     * @return the availability of the capability
+     */
+    boolean isRadioInterfaceCapabilitySupported(String capability);
 }

telephony/java/com/android/internal/telephony/RILConstants.java

@@ -520,6 +520,7 @@ public interface RILConstants {
     int RIL_REQUEST_START_HANDOVER = 217;
     int RIL_REQUEST_CANCEL_HANDOVER = 218;
     int RIL_REQUEST_GET_SYSTEM_SELECTION_CHANNELS = 219;
+    int RIL_REQUEST_GET_HAL_DEVICE_CAPABILITIES = 220;
 
     /* Responses begin */
     int RIL_RESPONSE_ACKNOWLEDGEMENT = 800;