libmedia: Creating new sessionId when a dead IAudioTrack object is detected

-  Monkey: ToneGenerator: ToneGenerator init failed resulted in framework disconnect.
-  AudioFlinger could not create track because of a dead session id is used.
   As a result, AudioTrack failed to initialize Tonegenerator with the dead session.
-  Creating new sessionId when a dead IAudioTrack object is detected
   and also when the media server is killed in any state.

Change-Id: I9402bee89557846c80d13ba44a0f745c6cbd69c8
CRs-Fixed: 294151