RoboErik c47fa84b0a Refactor transport controls APIs
This merges TransportPerformer into MediaSession + a
TransportControlsCallback and makes TransportController into an
inner class on MediaController called TransportControls. Also makes
the PlaybackState and Metadata part of the session APIs instead of
transport controls.

Change-Id: I16ad392e6d318abe3119ad5d89656d253af25e16
2014-05-30 10:35:44 -07:00
..
2014-05-30 10:35:44 -07:00