With this CL, the main and shadow filters are no longer fully reset to 0 as the delay changes. This allows for more robust echo removal for some scenarios. Bug: webrtc:9879,chromium:895838 Change-Id: I859aa3df3ae41648bc8efde01ec2e2a5cb392279 Reviewed-on: https://webrtc-review.googlesource.com/c/106345 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25251}