tree 85cf28bcfc440f0d78ffa6b6d610ac4a13f46634
parent 54b15e98cdb40969929fa23ce42e6817a4b8392c
author Andrew Chant <achant@google.com> 1517874902 -0800
committer Andrew Chant <achant@google.com> 1518568955 -0800

ALSA jack detection support

Adds support for ALSA jack detection for USB.
Spawns a new thread for ALSA jack detection on device
insert.  If the device doesn't support ALSA jack detection,
the thread terminates.

Test: UAC2 audio accessory and a kernel
which supports USB ALSA Jack detection, switching between
speaker and USB works perfectly with plug/unplug at jack.

Bug: 68337205
Bug: 70632415
Change-Id: I1800660ad4d2341f19ce7be6d6b01f81a7f2d1a6