This allows the SslRole to be queried from the network thread which
will simplify some code paths and avoid thread hopping.
The next steps will be to remove GetSctpSslRole and only query the
DTLS role on the network thread and start combining other operations.
Bug: webrtc:11547
Change-Id: I222dc838fc5ee274a294c8d81d38b5a4ea8fea1f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/298302
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39642}
c61eee28f3