Move isMediaOutputDisabled() from Utils to LocalMediaManager

- Move isMediaOutputDisabled() from Utils to LocalMediaManager.
  The isMediaOutputDisabled() is used to check whether should
  disable the entry point of media output, it's not a general
  method for Settings. To reduce the usage of Utils.java,
  it's better to let LocalMediaManager handle this method.
- Add test cases.

Bug: 169378895
Test: make -j42 RunSettingsRoboTests
Change-Id: I5dbed2ad4de6dca8105414f8b7d7ce7141e258bd

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

@@ -247,6 +247,10 @@ public class MediaDeviceUpdateWorker extends SliceBackgroundWorker
 
     }
 
+    boolean shouldDisableMediaOutput(String packageName) {
+        return mLocalMediaManager.shouldDisableMediaOutput(packageName);
+    }
+
     private class DevicesChangedBroadcastReceiver extends BroadcastReceiver {
         @Override
         public void onReceive(Context context, Intent intent) {