This CL reduces the delay estimator step size to make it react better in scenarios where the environment is noisy, or the echo level is fairly low. Bug: webrtc:9177,chromium:835281 Change-Id: I482d898c91eddc497e1284ee500d26df21a0574a Reviewed-on: https://webrtc-review.googlesource.com/71486 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22990}