Rename to better match what it does, Adjust to support two-byte header extension Bug: webrtc:7990 Change-Id: I2786d70e7cf9cd3d722f54fb1d07c9cfaafab947 Reviewed-on: https://webrtc-review.googlesource.com/103201 Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Johannes Kron <kron@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24958}