On ASan, SimulatedRealTimeControllerConformanceTest is flaky and
triggers `stack-use-after-scope` because on some occasions, the delayed
callback gets invoked when the test is tearing down (the callback
holds a reference to an object allocated on the test function stack).
This CL ensures threads and TaskQueues are stopped when the tests
scope is exited. Some flakiness might remain on realtime tests but
that can only be addressed by increasing the wait.
Bug: webrtc:12954
Change-Id: I4ac1a6682e18bb144a3aeb03921a805e3fb39b2d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225422
Reviewed-by: Andrey Logvin <landrey@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34437}
