added in API level 21


MediaBrowser Browses media content offered by a link MediaBrowserService. 
MediaBrowser.ConnectionCallback Callbacks for connection related events. 
MediaBrowser.ItemCallback Callback for receiving the result of MediaBrowser.getItem(String, MediaBrowser.ItemCallback)
MediaBrowser.MediaItem A class with information on a single media item for use in browsing/searching media. 
MediaBrowser.SubscriptionCallback Callbacks for subscription related events.