Adds a killswitch
WebRTC-SetCodecPreferences-ReceiveOnlyFilterInsteadOfThrow
to accompany the spec-change to throw when codec capabilities
are taken from the RtpSender instead of the RtpReceiver.
With the killswitch triggered, such codecs will be filtered.
BUG=webrtc:15396
Change-Id: I7d27111c72085eb7a7b2a1e66d0a08d12883ce17
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/341460
Reviewed-by: Florent Castelli <orphis@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41845}