RTT initialization bug fixes

Add a setting toggle to enable/disable RTT
Allow calls to be initiated with RTT enabled (add plumbing)
Refactor to match the change to dial()

Bug: 71873552
Test: manual
Change-Id: I79b415751b7f1495a3cd603b83f8c4df4389c4c8
Merged-In: I79b415751b7f1495a3cd603b83f8c4df4389c4c8
9 files changed