Make BluetoothAdapter#disable(boolean persist) a @SystemApi am: f599dc49a2 am: 921bdf79d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15960228

Change-Id: Ib97e835bdb2be865f26c1f63d68e25b204e12aa0
tree: f5c6ec388bc73cd088b58e5306f11e8286fd8478
  1. framework/
  2. service/