Roll WebRTC from d97b6499c3ef to 71566bc802cc (4 revisions)

https://webrtc.googlesource.com/src.git/+log/d97b6499c3ef..71566bc802cc

2024-04-03 danilchap@webrtc.org In VideoEncoderFactoryTemplate pass webrtc::Environment to individual traits
2024-04-03 davidben@webrtc.org Replace a memcpy with std::copy_n
2024-04-03 danilchap@webrtc.org Update InternalEncoderFactory to implement non-deprecated variant of CreateVideoEncoder
2024-04-03 boivie@webrtc.org pc: Provide DtlsTransport to SctpTransport constr

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://issues.skia.org/issues/new?component=1389291&template=1850622

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

Bug: chromium:40248746
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I2ced16add67e662be7f28243dc94233a6ea6f08b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5419882
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1281968}