Add API setAllowedCarriers, getAllowedCarriers to TelephonyManager

Also:
   Add RIL constants RIL_REQUEST_SET_ALLOWED_CARRIERS, RIL_REQUEST_GET_ALLOWED_CARRIERS

Bug: 28564314
Change-Id: Iaf6c40de633e767309c4088249a5c13cb0988c5c
4 files changed