Optimized layout of VideoCastControllerActivity
Tweaked notification layout
Tweaked MiniController layout
Use small progressBar style for MiniController and notification.
Set play button visibility to GONE instead of INVISIBLE in
MiniController
Optimized MediaRouteControllerDialog and its layout
Removed unused string resources and set the library version to 1.8B
Removed unused tablet-specific dimensions
Fixed notification progress bar not properly hidden