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
Merge branch 'master' of github.com:googlesamples/androidtv-Leanback
Merge branch 'master' of github.com:googlesamples/androidtv-Leanback
Update Gradle 2.1 and build tools 21.0.2
Merge pull request #7 from cartland/master

Update Gradle and SDK build tools