Add patch for tvview callback run in single thread.

Bug: 330634450
Change-Id: Ia54bc03734e9598319923463afcaddbb981a5351
diff --git a/media/java/android/media/tv/TvView.java b/media/java/android/media/tv/TvView.java
index e604cb7..82e6ed3 100644
--- a/media/java/android/media/tv/TvView.java
+++ b/media/java/android/media/tv/TvView.java
@@ -91,7 +91,7 @@
     private static final Object sMainTvViewLock = new Object();
     private static WeakReference<TvView> sMainTvView = NULL_TV_VIEW;
 
-    private final Handler mHandler = new Handler();
+    private Handler mHandler = new Handler();
     private Session mSession;
     private SurfaceView mSurfaceView;
     private Surface mSurface;
@@ -207,6 +207,17 @@
         mCallback = callback;
     }
 
+    /**
+     * Sets the handler to be invoked when an event is dispatched to this TvView.
+     * If handler is not set by this function, TvView will use its default handler.
+     *
+     * @param handler The handler to handle events.
+     * @hide
+     */
+    public void setHandler(@NonNull Handler handler) {
+        mHandler = handler;
+    }
+
     /** @hide */
     public Session getInputSession() {
         return mSession;