Keeping just the header doesn't save memory because header is taken as slice of the original packet (and thus keeps a reference to the buffer containing full packet) Keeping full packet is simpler and avoid extra unused buffer created during RtpPacket default contruction Bug: b/187593466 Change-Id: I78d7201d110092fc039203e1caa2fb9c3afbc079 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/218161 Reviewed-by: Björn Terelius <terelius@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33974}