notifyCarrierNetworkChange:TelephonyManager->CarrierService

Re-checkin of 7f8be9d8.

ORIGINAL CHANGES:

Per API review, move TelephonyManager.notifyCarrierNetworkChange() to
CarrierService.notifyCarrierNetworkChange(). Underlying telephony
implementation remains unchanged.

Also minor tweaks to CarrierService:
* Remove some unnecessary @hide
* Remove final qualifier from onBind() so that subclasses can handle
  new internal callers that want to bind to it.

ADDITIONAL CHANGES:

- Fixes stack so that a SecurityException is thrown when caller
  does not have MODIFY_PHONE_STATE or carrier privileges.

Bug: 21572049
Bug: 21630803
Bug: 21721768

Change-Id: Ie952651d2f15c370de713ed8abb6d9f6f07dd2b4