Add telecom test-commands for maintaining role overrides.

This allows for easier testing of role-dependencies for Telecom (since
RoleManager is not yet fully implemented).

Bug: 63966743
Test: Manual
Merged-In: I92fd86411d1312be2255ec0634f059cd8e4bfc26
Change-Id: I92fd86411d1312be2255ec0634f059cd8e4bfc26