tree dd979eded564feacf06ffa9fb49d74e209e21146
parent b69f49bab9502ddb0850280f2aea12fb34475777
author Eric Laurent <elaurent@google.com> 1294171084 -0800
committer Alex Ray <aray@google.com> 1375217815 -0700

Fix issue 3302649.

The cause of the problem is that AudioTrack::start() can fail if it is called from a newly created
thread that has the same ID as the AudioTrack callback thread that has just been stopped and not yet exited.
This is possible as the thread ID used by the Thread class is not the TID.

The fix consists in clearing the thread ID before exiting the thread loop.

Change-Id: I66e679665c384403cb3ba2c31746f5de72d5836d