[LE Audio] Remove the broadcast icon when the device does not support

broadcast feature

Bug: 254743785
Test: manual test
Test: make RunSettingsRoboTests ROBOTEST_FILTER=MediaOutputIndicatorWorkerTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=MediaVolumePreferenceControllerTest
Change-Id: I02e429b3a306e2f9b0e2342118649208617c4944

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

@@ -165,6 +165,13 @@ public class MediaOutputIndicatorWorker extends SliceBackgroundWorker implements
         return mPackageName;
     }
 
+    /** Check if this device supports LE Audio Broadcast feature */
+    public boolean isBroadcastSupported() {
+        LocalBluetoothLeBroadcast broadcast =
+                mLocalBluetoothManager.getProfileManager().getLeAudioBroadcastProfile();
+        return broadcast != null ? true : false;
+    }
+
     public boolean isDeviceBroadcasting() {
         LocalBluetoothLeBroadcast broadcast =
                 mLocalBluetoothManager.getProfileManager().getLeAudioBroadcastProfile();