Workaround issue where SYSTEM_UI_FLAG_IMMERSIVE_STICKY is invalidated when a volume button is pressed (internal bug ref b/11986621) Immersive mode still does not recover when the screen has been rotated, due to onSystemUiVisibilityChange is not triggered when screen is rotated (internal bug ref b/11990702) Change-Id: Ifdfe9b24d5c3c208441aeca0fbb2b1eaee39da95