AudioService: log ducking and incall muting of audio players

Event logger: add support for logging the text of the event in
  the logcat at the same time to avoid having the duplicate the
  logcat entry and the logger event. See printLog() method.
AudioPlaybackMonitor: log ducking and incall muting.

Test: play media and notification, verify logs appear in logcat and dumpsys audio
Bug:65363602
Change-Id: I2af0c2bbd2fde428f07761ca45e7950a16843604