Implemented global search in Android TV

Change-Id: I12cf24535595dd99f224a18d6c0e6744cecdaee3
Updated dummy meta data in global search so that they show up in deep link on detail page

Change-Id: I87d000165c4397e239a33a734ee9f10ba70f3f05
Removed logging
Fixed more comments
Fixed review comments

Added PlaybackOverlayFragment, ErrorFragment, shared element transition
Updated new listeners, simplified global search

Change-Id: Ibbcd3696cbe7008b42df3ebd775439c88c4cc241
Updated playback and build.gradle

Change-Id: Ic1b8c8946ba2d1de633cc06c4f5a80919cd02cf2
Fixed review comments
Renamed package
Implmented FFW/RWD in media control of playback
Added voice search for all activities
Fixed bugs in memory leak and others

Change-Id: I72a588d33eb0dd19b21cc4fe086dd8c49d82656e
Update VideoContentProvider.java