Merge changes I4b929fed,I0221ab61,If8d6a4e6,I9fa90826,I8eba8517 into sc-dev

* changes:
  Keep player set up to date, assign addressed player from it
  Create an AvrcpPlayer.Builder to consolidate constructors
  Add additional debugging output for available and addressed player status
  Fetch Available Players on our own when they change
  Ensure constructor's play status is included in PlaybackStateCompat