PacketBuffer takes RtpVideoHeader struct as an input that is complicated
and hard to fuzz. Current PacketBuffer doesn't fuzz it and thus has very
low coverage.
RtpVideoFrameAssembler uses PacketBuffer underneath and takes as input
almost raw rtp packet and thus easier to fuzz and better match production input
Bug: webrtc:7408
Change-Id: I00394c35e002a667760eed477f11ac7898f7eacc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/290574
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39013}
