Pass RtpPacket class of header and raw packet separately Bug: None Change-Id: Id6d107db0e3751ff3dec87321ce6f850da0ee33a Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153740 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29254}