Remove excessive log spam in large conferences in downstream project.
Remove excessive log spam in large conferences in downstream project.

Bug: chromium:1062963
Change-Id: I840382c530e016731112af890d1abe60f25c631a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173588
Reviewed-by: Danil Chapovalov <55de8d9c2b5977da2dd48f967f21f9d606b172a5@webrtc.org>
Commit-Queue: Markus Handell <768348205a06a910ddc83579aa8bc7de7ec9af14@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#31074}

TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc