Add a client for the MediaBrowserService.

1. Add a simple UI that shows
  a) using MediaBrowser to connect/browse to a MediaBrowserService exported by the same app.
  b) Use the MediaController callbacks to show and list the QueueItem objects.
2. Update the MusicService to add the activeQueueItemId to the PlaybackState.Builder. This
is used for marking/selecting the item being played.

Change-Id: I33b18804b571cd6e46f3f56bb534aa8b831e8acb
15 files changed
tree: b673664505367838c492774b955288ae47ee3808
  1. AutoMessagingDemo/
  2. JustForUs/
  3. MusicDemo/