AudioManager: add test API to query VolumePolicy

Bug: 351837292
Flag: EXEMPT bugfix
Test: atest CtsMediaAudioTestCases:android.media.audio.cts.AudioManagerTest#testAdjustUnmuteNotificationInSilent
Change-Id: Ibd7b30c963a84dc63008681cc1f2d63c86e8cf9c
diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index 099dbbc..2ca9f2e 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -1982,6 +1982,7 @@
     method @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_SETTINGS_PRIVILEGED) public float getRs2Value();
     method public int getStreamMinVolumeInt(int);
     method @NonNull public java.util.Map<java.lang.Integer,java.lang.Boolean> getSurroundFormats();
+    method @NonNull public android.media.VolumePolicy getVolumePolicy();
     method public boolean hasRegisteredDynamicPolicy();
     method @RequiresPermission(android.Manifest.permission.MODIFY_AUDIO_SETTINGS_PRIVILEGED) public boolean isCsdEnabled();
     method @RequiresPermission(anyOf={android.Manifest.permission.MODIFY_AUDIO_ROUTING, android.Manifest.permission.QUERY_AUDIO_STATE, android.Manifest.permission.MODIFY_AUDIO_SETTINGS_PRIVILEGED}) public boolean isFullVolumeDevice();
@@ -2073,6 +2074,20 @@
     method public android.media.PlaybackParams setAudioStretchMode(int);
   }
 
+  public final class VolumePolicy implements android.os.Parcelable {
+    ctor public VolumePolicy(boolean, boolean, boolean, int);
+    method public int describeContents();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field public static final int A11Y_MODE_INDEPENDENT_A11Y_VOLUME = 1; // 0x1
+    field public static final int A11Y_MODE_MEDIA_A11Y_VOLUME = 0; // 0x0
+    field @NonNull public static final android.os.Parcelable.Creator<android.media.VolumePolicy> CREATOR;
+    field @NonNull public static final android.media.VolumePolicy DEFAULT;
+    field public final boolean doNotDisturbWhenSilent;
+    field public final int vibrateToSilentDebounce;
+    field public final boolean volumeDownToEnterSilent;
+    field public final boolean volumeUpToExitSilent;
+  }
+
   public static final class VolumeShaper.Configuration.Builder {
     method @NonNull public android.media.VolumeShaper.Configuration.Builder setOptionFlags(int);
   }
diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index 124f1f0..25c767a 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -7435,6 +7435,21 @@
     }
 
     /**
+     * @hide
+     * Queries the volume policy
+     * @return the volume policy currently in use
+     */
+    @TestApi
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
+    public @NonNull VolumePolicy getVolumePolicy() {
+        try {
+            return getService().getVolumePolicy();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * Set Hdmi Cec system audio mode.
      *
      * @param on whether to be on system audio mode
diff --git a/media/java/android/media/IAudioService.aidl b/media/java/android/media/IAudioService.aidl
index 08cc126..d42b256 100644
--- a/media/java/android/media/IAudioService.aidl
+++ b/media/java/android/media/IAudioService.aidl
@@ -386,6 +386,8 @@
 
     void setVolumePolicy(in VolumePolicy policy);
 
+    VolumePolicy getVolumePolicy();
+
     boolean hasRegisteredDynamicPolicy();
 
     void registerRecordingCallback(in IRecordingConfigDispatcher rcdb);
diff --git a/media/java/android/media/VolumePolicy.java b/media/java/android/media/VolumePolicy.java
index b193b70..96de72d 100644
--- a/media/java/android/media/VolumePolicy.java
+++ b/media/java/android/media/VolumePolicy.java
@@ -16,39 +16,53 @@
 
 package android.media;
 
+import android.annotation.NonNull;
+import android.annotation.SuppressLint;
+import android.annotation.TestApi;
 import android.os.Parcel;
 import android.os.Parcelable;
 
 import java.util.Objects;
 
 /** @hide */
+@TestApi
+@SuppressLint("UnflaggedApi") // @TestApi without associated feature.
 public final class VolumePolicy implements Parcelable {
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
+    @NonNull
     public static final VolumePolicy DEFAULT = new VolumePolicy(false, false, false, 400);
 
     /**
      * Accessibility volume policy where the STREAM_MUSIC volume (i.e. media volume) affects
      * the STREAM_ACCESSIBILITY volume, and vice-versa.
      */
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public static final int A11Y_MODE_MEDIA_A11Y_VOLUME = 0;
     /**
      * Accessibility volume policy where the STREAM_ACCESSIBILITY volume is independent from
      * any other volume.
      */
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public static final int A11Y_MODE_INDEPENDENT_A11Y_VOLUME = 1;
 
     /** Allow volume adjustments lower from vibrate to enter ringer mode = silent */
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public final boolean volumeDownToEnterSilent;
 
     /** Allow volume adjustments higher to exit ringer mode = silent */
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public final boolean volumeUpToExitSilent;
 
     /** Automatically enter do not disturb when ringer mode = silent */
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public final boolean doNotDisturbWhenSilent;
 
     /** Only allow volume adjustment from vibrate to silent after this
         number of milliseconds since an adjustment from normal to vibrate. */
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public final int vibrateToSilentDebounce;
 
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public VolumePolicy(boolean volumeDownToEnterSilent, boolean volumeUpToExitSilent,
             boolean doNotDisturbWhenSilent, int vibrateToSilentDebounce) {
         this.volumeDownToEnterSilent = volumeDownToEnterSilent;
@@ -82,19 +96,22 @@
                 && other.vibrateToSilentDebounce == vibrateToSilentDebounce;
     }
 
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     @Override
     public int describeContents() {
         return 0;
     }
 
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     @Override
-    public void writeToParcel(Parcel dest, int flags) {
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
         dest.writeInt(volumeDownToEnterSilent ? 1 : 0);
         dest.writeInt(volumeUpToExitSilent ? 1 : 0);
         dest.writeInt(doNotDisturbWhenSilent ? 1 : 0);
         dest.writeInt(vibrateToSilentDebounce);
     }
 
+    @SuppressLint("UnflaggedApi") // @TestApi without associated feature.
     public static final @android.annotation.NonNull Parcelable.Creator<VolumePolicy> CREATOR
             = new Parcelable.Creator<VolumePolicy>() {
         @Override
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java
index 6d9b4f5..0d309eb 100644
--- a/services/core/java/com/android/server/audio/AudioService.java
+++ b/services/core/java/com/android/server/audio/AudioService.java
@@ -977,7 +977,7 @@
 
     private NotificationManager mNm;
     private AudioManagerInternal.RingerModeDelegate mRingerModeDelegate;
-    private VolumePolicy mVolumePolicy = VolumePolicy.DEFAULT;
+    private volatile VolumePolicy mVolumePolicy = VolumePolicy.DEFAULT;
     private long mLoweredFromNormalToVibrateTime;
 
     // Array of Uids of valid assistant services to check if caller is one of them
@@ -12101,6 +12101,11 @@
         }
     }
 
+    @Override
+    public VolumePolicy getVolumePolicy() {
+        return mVolumePolicy;
+    }
+
     /** Interface used for enforcing the safe hearing standard. */
     public interface ISafeHearingVolumeController {
         /** Displays an instructional safeguard as required by the safe hearing standard. */