Rethrow setMediaButtonBroadcastReceiver exceptions

setMediaButtonBroadcastReceiver signals invalid arguments with
exceptions, so remote exceptions are valid and should be rethrown from
system server.

Test: atest CtsMediaBetterTogetherTestCases
Bug: 205124386
Change-Id: I6cb66d8336735f9c32d30d7d49ff28a2797bec60

media/java/android/media/session/MediaSession.java

@@ -315,7 +315,7 @@ public final class MediaSession {
             }
             mBinder.setMediaButtonBroadcastReceiver(broadcastReceiver);
         } catch (RemoteException e) {
-            Log.wtf(TAG, "Failure in setMediaButtonBroadcastReceiver.", e);
+            e.rethrowFromSystemServer();
         }
     }