This is tested by a simple unit test and a new fuzzer that verify that all that can be parsed also can be written. Bug: webrtc:12000 Change-Id: I461aedf97d3dec6e8916e72110fa097c3b31c27f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/231642 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Cr-Commit-Position: refs/heads/main@{#34986}