[autotest] audio_test_utils: Ignore certian frequencies in the check

Ignore certain frequencies in the check so test user can ignore some
known noise resource.

BUG=chromium:561256
TEST=not used yet

Change-Id: I995e42070f051a82c99afbfcf67aee0f6d49f479
Reviewed-on: https://chromium-review.googlesource.com/314430
Commit-Ready: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Kalin Stoyanov <kalin@chromium.org>
1 file changed