Enable webrtc backend info logging when webRTCMediaPipelineAdditionalLoggingEnabled is true
<rdar://problem/106291296>
Pull request: https://github.com/WebKit/WebKit/pull/11116
Committed 261340@main (98689ee13eda): <https://commits.webkit.org/261340@main> Reviewed commits have been landed. Closing PR #11116 and removing active labels.