DTLS 1.3 encrypts more parts of the handshake so we move from deep packet inspection to looking at the state of DTLS to decide whether to intercept the packet. BUG=webrtc:367395350 Change-Id: Idb1eda0437f24002f48381af5d6a167a4a153381 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/374501 Reviewed-by: Jonas Oreland <jonaso@webrtc.org> Commit-Queue: Jonas Oreland <jonaso@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43794}