Recreate overlay view after the TIS crashes

The overlay view should be recreated when the session is recreated
after the TIS crash.

Change-Id: I7605aac0feed644ae29d65127f68630c3658343f

media/java/android/media/tv/TvView.java

@@ -869,6 +869,8 @@ public class TvView extends ViewGroup {
             if (this != mSessionCallback) {
                 return;
             }
+            mOverlayViewCreated = false;
+            mOverlayViewFrame = null;
             mSessionCallback = null;
             mSession = null;
             if (mListener != null) {