Glenn Kasten 33b840444f Use audio_session_t consistently
Also prefer AudioManager.AUDIO_SESSION_ID_GENERATE over
AudioSystem.AUDIO_SESSION_ALLOCATE, because
AudioSystem.AUDIO_SESSION_ALLOCATE is @hide.

Bug: 27562099
Change-Id: I5924554feb919db7f2390f5b062faedd515421af
2016-03-10 10:35:49 -08:00
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