Build Telecom sources once

Put all the Telecom sources and resources into an android_library
so that they are only built once and can always use a single package
name to refer to the resources once use_resource_processor: true is
enabled.

Bug: 294256649
Test: mmma packages/services/Telecomm
Change-Id: I0b2917e795757fdec0f9b12fb7c19a0a0c95a838