Adds Telecom Logging to TelecomServiceImpl.

Adds Telecom logging sessions to the major entry points in TelecomServiceImpl
and other modules in order to track the code paths of other processess.

Refactor CallAudioRouteStateMachine to use callbacks in StateMachine to
handle logging.

Change-Id: I48a70afaf2028ace73608be4f825c49af16c1622