Level control handled by default-on AGC. Bug: none Change-Id: I405daeceece12c896d41156b649fcfd556726f77 Reviewed-on: https://webrtc-review.googlesource.com/59682 Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org> Reviewed-by: Alex Loiko <aleloi@webrtc.org> Commit-Queue: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22305}