Disable AudioOutputTest.Play200HzTone

Disable AudioOutputTest.Play200HzTone from sheriff.
https://analysis.chromium.org/p/chromium/flake-portal/flakes/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyQQsSBUZsYWtlIjZjaHJvbWl1bUBtZWRpYV91bml0dGVzdHNAQXVkaW9PdXRwdXRUZXN0LlBsYXkyMDBIelRvbmUM

TBR=sergeyu@chromium.org

Bug: 976227
Change-Id: I8024d35915dc43a88c37f57b665c9e030cc8e8cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1668088
Reviewed-by: Lan Wei <lanwei@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#670695}
1 file changed