Fill the `kind` attribute in RtpStreamStats and also a few more video frame related attributes for inbound rtp stats.
Pull request: https://github.com/WebKit/WebKit/pull/8099
Committed 258659@main (ecd45a098ed5): <https://commits.webkit.org/258659@main> Reviewed commits have been landed. Closing PR #8099 and removing active labels.
<rdar://problem/104026500>