new carrier id APIs

1. New telephony APIs to getCurrentCarrierId
and getCurrentCarrierName
2. New broadcast intent to notify carrier id changed

Bug: 64131637
Test: Build
Change-Id: I9a240ba7df313ad701f98bb3982f29c3d5317da8
(cherry picked from commit fff6f59a63304be50e7a251fb4fca38ae0090fc4)
Merged-in: I9a240ba7df313ad701f98bb3982f29c3d5317da8
3 files changed