Prevent CommunicationDeviceTracker from use in refactored audio code.

There was a use of the legacy CommunicationDeviceTracker in the new
refactored audio routing code path.  This CL prevents that invocation from
being hit.

Test: Manual test of unfocus scenario
Flag: com.android.server.telecom.flags.dont_use_communication_device_tracker
Fixes: 346472575
Change-Id: I8f1a5c2d216dff9c14397a0e36a2a1cb83f8b3e4