fix video and music can be played at same time

requestAudioFocus() before play video in Gallery

Change-Id: If70e51eb86d7d4379473cf5bd2185bed9bb03eaa
diff --git a/src/com/android/gallery3d/app/MoviePlayer.java b/src/com/android/gallery3d/app/MoviePlayer.java
index 06773f8..c79c44f 100755
--- a/src/com/android/gallery3d/app/MoviePlayer.java
+++ b/src/com/android/gallery3d/app/MoviePlayer.java
@@ -579,6 +579,7 @@
             boolean start) {
         // For streams that we expect to be slow to start up, show a
         // progress spinner until playback starts.
+        requestAudioFocus();
         String scheme = mMovieItem.getUri().getScheme();
         if ("http".equalsIgnoreCase(scheme) || "rtsp".equalsIgnoreCase(scheme)
                 || "https".equalsIgnoreCase(scheme)) {
@@ -630,7 +631,7 @@
             Log.w(TAG, "CS/CSVT Call is in progress, can't play video");
             return false;
         }
-
+        requestAudioFocus();
         mTState = TState.PLAYING;
         mVideoView.start();
         mController.showPlaying();
@@ -808,6 +809,7 @@
         mOverlayExt.setCanScrubbing(canSeek);
         mController.setPlayPauseReplayResume();
         if (!canPause && !mVideoView.isTargetPlaying()) {
+            requestAudioFocus();
             mVideoView.start();
         }
         updateRewindAndForwardUI();