Implement working bluetooth autoplay:
 - add Bluetooth permission to manifest, add Bluetooth options to preferences and register a listener to start playing when a Bluetooth device is connected

Change-Id: Ica1332df94a0731be26b1294695c9b0a9957b428
Merge branch 'add-bluetooth-autoplay-support' of https://github.com/erindru/android_packages_apps_Apollo into add-bluetooth-autoplay-support