CallAudioWatchdog cleanups.

1. Always log audio sessions in the dumpsys; we were doing this only for
calls which weren't Telecom calls, however it is nicer to see them both
in one place from an audio perspective.
2. If all media resources end for a call, don't immediately remove it if
has a Telecom call ID associated.  One voip app started and stopped media
entirely during the scope of a single telecom call; this ensures we don't
count that as two separate calls.  Granted, a non-telecom call could get
double-counted for the same reason, however during manual testing of
a number of voip apps this was not seen in any other app.
3. When a call is removed from Telecom, don't remove it from the CAW
unless all audio resources are cleaned up.  We'll cleanup the session once
all audio resources are freed.

Flag: com.android.server.telecom.flags.enable_call_audio_watchdog
Test: Run full CTS suite with flag on
Test: Comprehensive manual testing with voip apps.
Bug: 384570270
Change-Id: Ib684e81335b4b29644ed41af5350396ac6808b94