Add strings and carrier config needed network service.

Add resource overlay and carrier config which will determine
which package / network services will be bound to.

Bug: 64132030
Test: regression tests
Change-Id: I5f515ec16b712e7be25f69e0e079d672227542b0
Merged-In: I5f515ec16b712e7be25f69e0e079d672227542b0