Broadcast Action: The state of the local Bluetooth adapter has been changed.
For example, Bluetooth has been turned on or off.
Always contains the extra fields BluetoothAdapter.ExtraState and BluetoothAdapter.ExtraPreviousState containing the new and old states respectively.
Requires NoType:android/Manifest$permission;Href=../../../reference/android/Manifest.permission.html#BLUETOOTH to receive.