to fuzz the code parsing DTLS packets for DTLS-STUN piggybacking BUG=webrtc:367395350 Change-Id: Ifa1a52ef56b322e465604e8d49ae18e5dc27613f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/371360 Reviewed-by: Jonas Oreland <jonaso@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Philipp Hancke <phancke@meta.com> Cr-Commit-Position: refs/heads/main@{#43562}