Fix 5158468: Hide system bar when no play control is shown.

Change-Id: Iada70c39440f19eec1cb00088531719bc1bb8328
diff --git a/src/com/android/gallery3d/app/MovieActivity.java b/src/com/android/gallery3d/app/MovieActivity.java
index 6bc6fdc..ef836fe 100644
--- a/src/com/android/gallery3d/app/MovieActivity.java
+++ b/src/com/android/gallery3d/app/MovieActivity.java
@@ -73,6 +73,7 @@
         Window win = getWindow();
         WindowManager.LayoutParams winParams = win.getAttributes();
         winParams.buttonBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_OFF;
+        winParams.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
         win.setAttributes(winParams);
     }