SendStunBindingRequest can cause a SocketAddress pointed to by the
iterator to be deleted asynchronously before returning, causing `it`
to be invalid when incrementing in the continuation step.
Bug: webrtc:7309, webrtc:14131
Change-Id: I3f7d3d7c12935d9592ef3642679a821c58826df9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/270744
Commit-Queue: Sameer Vijaykar <samvi@google.com>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37741}
1e688612cc