- mute/unmute API. - speech level/energy/duration API. Bug: webrtc:12111 Change-Id: I54757b9874d15d59a145f2ca70801ee9ef0f4430 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/191060 Commit-Queue: Tim Na <natim@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32607}