In this CL the ERLE estimator is reset after a pre-amplifier gain change is communicated to APM. Bug: webrtc:9805 Change-Id: I040f344e4607e862240250f9478d06de0d58a096 Reviewed-on: https://webrtc-review.googlesource.com/103222 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org> Reviewed-by: Alex Loiko <aleloi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24933}