Removed data and voice RAT from service state

The voice and data RAT are now derived from
CS and PS network registration info.

Test: Manual + unit tests
Bug: 129863444

Merged-In: I3f4cb6057a4ae821363099583eeac7c867147afb
Change-Id: I3f4cb6057a4ae821363099583eeac7c867147afb
(cherry picked from commit 5ff5ab56)