Roll WebRTC from d9faa73cbbc1 to 6a1ded02d940 (1 revision)

https://webrtc.googlesource.com/src.git/+log/d9faa73cbbc1..6a1ded02d940

2023-03-17 jleconte@google.com Revert "Exercise AV1 simulcast paths in tests."

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/webrtc-chromium-autoroll
Please CC webrtc-chromium-sheriffs-robots@google.com,webrtc-infra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in WebRTC: https://bugs.chromium.org/p/webrtc/issues/entry
To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I4a6dcdc0fc9f1134da8f81996c319b3f50137fb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4348070
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1118887}