GitLab

It is possible an AudioOutputDevice is created
and waiting for authorization when destruction
happens. Add a stop call to ensure it gets
cleaned up.

Bug: b/141012708
Test: Local build, before/after manual testing.
Change-Id: If454095f2d3d44d20b84a9135151248372b0a574
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1832727Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Commit-Queue: Brett Kilty <brettk@google.com>
Cr-Commit-Position: refs/heads/master@{#702041}