This sample shows how to implement an audio media app that provides media library metadata and playback controls through a standard service. It exposes a simple music library through the new MediaBrowserService and provides MediaSession callbacks. This allows it to be used in Android Auto, for example. When not connected to a car, the app has a very simple UI that browses the media library and provides simple playback controls. When connected to Android Auto, the same service provides data and callback to the Android Auto UI in the same manner as it provides them to the local UI.