Reland of Added a bitexactness test for the echo control mobile in the audio processing module

The reverted CL https://codereview.webrtc.org/1805373002/ was reverted due to an error in another CL.

BUG=webrtc:5663
TBR=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1822653005

Cr-Original-Commit-Position: refs/heads/master@{#12090}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 8d2ade65b15fd9ab11838b7786c1ec843a3ce443
2 files changed