[LE Audio] Add entry point in Media Volume slice for broadcast sink

Bug: 228274114
Test: make RunSettingsRoboTests
Test: Manual test
Change-Id: I331232c30291348faf7166d4de8060a1cfe12bff

src/com/android/settings/media/MediaOutputIndicatorWorker.java

@@ -34,6 +34,7 @@ import androidx.annotation.Nullable;
 import com.android.settings.bluetooth.Utils;
 import com.android.settings.slices.SliceBackgroundWorker;
 import com.android.settingslib.bluetooth.BluetoothCallback;
+import com.android.settingslib.bluetooth.LocalBluetoothLeBroadcast;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 import com.android.settingslib.media.LocalMediaManager;
 import com.android.settingslib.media.MediaDevice;
@@ -126,7 +127,7 @@ public class MediaOutputIndicatorWorker extends SliceBackgroundWorker implements
     }
 
     @Nullable
-    MediaController getActiveLocalMediaController() {
+    public MediaController getActiveLocalMediaController() {
         return MediaOutputUtils.getActiveLocalMediaController(mContext.getSystemService(
                 MediaSessionManager.class));
     }
@@ -156,7 +157,7 @@ public class MediaOutputIndicatorWorker extends SliceBackgroundWorker implements
         return mMediaDevices;
     }
 
-    MediaDevice getCurrentConnectedMediaDevice() {
+    public MediaDevice getCurrentConnectedMediaDevice() {
         return mLocalMediaManager.getCurrentConnectedDevice();
     }
 
@@ -164,6 +165,15 @@ public class MediaOutputIndicatorWorker extends SliceBackgroundWorker implements
         return mPackageName;
     }
 
+    public boolean isDeviceBroadcasting() {
+        LocalBluetoothLeBroadcast broadcast =
+                mLocalBluetoothManager.getProfileManager().getLeAudioBroadcastProfile();
+        if (broadcast == null) {
+            return false;
+        }
+        return broadcast.isEnabled(null);
+    }
+
     private class DevicesChangedBroadcastReceiver extends BroadcastReceiver {
         @Override
         public void onReceive(Context context, Intent intent) {