Use global telecom lock for CallerInfoLookupHelper

Previous implementation of a separate lock in CallerInfoLookupHelper
caused deadlocks because completed queries re-entering Telecom would
grab the CILH lock before the telecom lock, while outgoing queries would
grab the telecom lock before the CILH lock.

Change-Id: I50d94e7025d8b4b865edc5cbd73960c3703b2944
Fixes: 28007333