TelephonyService: Move REMOVE_BLACKLIST to static receiver.

  - In a Multi-sim device, utilizing the PhoneAppBroadcastReceiver cannot
  be guaranteed to be alive. Instead, we utilize the static
  NotificationBroadcastReceiver to handle our REMOVE_BLACKLIST action.

Change-Id: Iffb915339956a3ab001597772c288533808bda1e