The public API to obtain the selected candidate pair is changed to GetSelectedCandidatePair in the ICE transport, and the returned pair has address-sanitized candidates. Bug: chromium:993878 Change-Id: I44f9d2385a84f9e22447108be2e57ef9e62671eb Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/149080 Reviewed-by: Steve Anton <steveanton@webrtc.org> Commit-Queue: Qingsi Wang <qingsi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28869}