Integrate Registration APIs

1) Pipe ImsRegistration interface through ImsResolver
so that ImsManager can access the ImsService's
Registration APIs.

2) Tear down ImsManager when the ImsService becomes
unavailable and recreate it with the new ImsService.

3) Update namespaces.

Bug: 63987047
Test: Manual, Telephony unit tests
Merged-In: I1e07e15bc8effc06a4687183f0e67f4e253656ab
Change-Id: I1e07e15bc8effc06a4687183f0e67f4e253656ab
8 files changed