Fixed enableLocationUpdates crash

1. The EVENT_GET_LOC_DONE handler dit not handle the
   new voice registration response properly. This is a
   regression introduced in ag/1907337.

2. Make ServiceStateTracker unit tests passed again!
   Fixed a regression introduced by the Trebel change ag/1750738.
   Return value of EVENT_RESTRICTED_STATE_CHANGED now is an integer
   instead of an integer array.

Test: Telephony sanity tests
bug: 35980759
Change-Id: Idcacc4c891950913172be00daa966e7eb5be7fa6