diff --git a/api/system-current.txt b/api/system-current.txt
index 222fb1755c506..3321677918f97 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -802,12 +802,17 @@ package android.app {
     method @RequiresPermission(android.Manifest.permission.ENTER_CAR_MODE_PRIORITIZED) public void enableCarMode(@IntRange(from=0) int, int);
     method @RequiresPermission(android.Manifest.permission.READ_PROJECTION_STATE) public int getActiveProjectionTypes();
     method @NonNull @RequiresPermission(android.Manifest.permission.READ_PROJECTION_STATE) public java.util.Set<java.lang.String> getProjectingPackages(int);
+    method @RequiresPermission(value=android.Manifest.permission.TOGGLE_AUTOMOTIVE_PROJECTION, conditional=true) public boolean releaseProjection(int);
     method @RequiresPermission(android.Manifest.permission.READ_PROJECTION_STATE) public void removeOnProjectionStateChangeListener(@NonNull android.app.UiModeManager.OnProjectionStateChangeListener);
+    method @RequiresPermission(value=android.Manifest.permission.TOGGLE_AUTOMOTIVE_PROJECTION, conditional=true) public boolean requestProjection(int);
     field public static final String ACTION_ENTER_CAR_MODE_PRIORITIZED = "android.app.action.ENTER_CAR_MODE_PRIORITIZED";
     field public static final String ACTION_EXIT_CAR_MODE_PRIORITIZED = "android.app.action.EXIT_CAR_MODE_PRIORITIZED";
     field public static final int DEFAULT_PRIORITY = 0; // 0x0
     field public static final String EXTRA_CALLING_PACKAGE = "android.app.extra.CALLING_PACKAGE";
     field public static final String EXTRA_PRIORITY = "android.app.extra.PRIORITY";
+    field public static final int PROJECTION_TYPE_ALL = 65535; // 0xffff
+    field public static final int PROJECTION_TYPE_AUTOMOTIVE = 1; // 0x1
+    field public static final int PROJECTION_TYPE_NONE = 0; // 0x0
   }
 
   public static interface UiModeManager.OnProjectionStateChangeListener {
diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index ac4b36976921a..ede08d547bc35 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -750,12 +750,17 @@ package android.app {
     method @RequiresPermission(android.Manifest.permission.ENTER_CAR_MODE_PRIORITIZED) public void enableCarMode(@IntRange(from=0) int, int);
     method @RequiresPermission(android.Manifest.permission.READ_PROJECTION_STATE) public int getActiveProjectionTypes();
     method @NonNull @RequiresPermission(android.Manifest.permission.READ_PROJECTION_STATE) public java.util.Set<java.lang.String> getProjectingPackages(int);
+    method @RequiresPermission(value=android.Manifest.permission.TOGGLE_AUTOMOTIVE_PROJECTION, conditional=true) public boolean releaseProjection(int);
     method @RequiresPermission(android.Manifest.permission.READ_PROJECTION_STATE) public void removeOnProjectionStateChangeListener(@NonNull android.app.UiModeManager.OnProjectionStateChangeListener);
+    method @RequiresPermission(value=android.Manifest.permission.TOGGLE_AUTOMOTIVE_PROJECTION, conditional=true) public boolean requestProjection(int);
     field public static final String ACTION_ENTER_CAR_MODE_PRIORITIZED = "android.app.action.ENTER_CAR_MODE_PRIORITIZED";
     field public static final String ACTION_EXIT_CAR_MODE_PRIORITIZED = "android.app.action.EXIT_CAR_MODE_PRIORITIZED";
     field public static final int DEFAULT_PRIORITY = 0; // 0x0
     field public static final String EXTRA_CALLING_PACKAGE = "android.app.extra.CALLING_PACKAGE";
     field public static final String EXTRA_PRIORITY = "android.app.extra.PRIORITY";
+    field public static final int PROJECTION_TYPE_ALL = 65535; // 0xffff
+    field public static final int PROJECTION_TYPE_AUTOMOTIVE = 1; // 0x1
+    field public static final int PROJECTION_TYPE_NONE = 0; // 0x0
   }
 
   public static interface UiModeManager.OnProjectionStateChangeListener {
diff --git a/core/java/android/app/UiModeManager.java b/core/java/android/app/UiModeManager.java
index 8a6871fdf3f05..e1c262caf44f9 100644
--- a/core/java/android/app/UiModeManager.java
+++ b/core/java/android/app/UiModeManager.java
@@ -651,6 +651,7 @@ public class UiModeManager {
      *
      * @hide
      */
+    @SystemApi
     @TestApi
     public static final int PROJECTION_TYPE_NONE = 0x0000;
     /**
@@ -660,6 +661,7 @@ public class UiModeManager {
      *
      * @hide
      */
+    @SystemApi
     @TestApi
     public static final int PROJECTION_TYPE_AUTOMOTIVE = 0x0001;
     /**
@@ -669,6 +671,7 @@ public class UiModeManager {
      *
      * @hide
      */
+    @SystemApi
     @TestApi
     public static final int PROJECTION_TYPE_ALL = 0xffff;
 
@@ -695,6 +698,7 @@ public class UiModeManager {
      *
      * @hide
      */
+    @SystemApi
     @TestApi
     @RequiresPermission(value = android.Manifest.permission.TOGGLE_AUTOMOTIVE_PROJECTION,
             conditional = true)
@@ -723,6 +727,7 @@ public class UiModeManager {
      *
      * @hide
      */
+    @SystemApi
     @TestApi
     @RequiresPermission(value = android.Manifest.permission.TOGGLE_AUTOMOTIVE_PROJECTION,
             conditional = true)