8f619182cb
Extend the media button event registration AudioManager API to enable applications to register as a client of "remote controls" and let them provide information meant to be displayed by the remotes. AudioService sends a AudioManager.REMOTE_CONTROL_CLIENT_CHANGED intent to let remote controls know when / from whom they can retrieve the information to display. Only application that own audio focus, are the currently registered media button event receiver, and have registered a remote control client, are eligible to appear on the remote control. To address in future CLs: - change how a remote control client forces a refresh - rename methods called under lock to ___Locked() - make API public Change-Id: Icca30ab05dac2605ee9246f8acb27a03dcea077a