carrier identification

CarrierIdentifier identifies the subscription carrier and returns a
canonical carrier Id and a user friendly carrier name.
CarrierIdentifier reads subscription info and check against all carrier
matching rules stored in CarrierIdProvider

Test: runtest --path CarrierIdentifierTest.java
Bug: 64131637
Change-Id: I3f1a1ddd124037e85d702f22d076d75223cb5276