Investigation showed that a function is revalidating STUN packets against the wrong password. This CL also allows absl/strings/escape.h as #include. Bug: chromium:1177125 Change-Id: Ie068d4c076a5462f2922a012f5e1de23aa6c0b06 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/279560 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Jonas Oreland <jonaso@webrtc.org> Cr-Commit-Position: refs/heads/main@{#38438}