updated to prflx.
When the address of a local candidate is intentionally removed after
gathered, its would be incorrectly updated to prflx when receiving a
STUN message from a remote candidate after forming a candidate pair and
starting the connectivity check.
Bug: webrtc:9756, webrtc:9605
Change-Id: I6c699250565c1458e825eba742c2991a82229817
Reviewed-on: https://webrtc-review.googlesource.com/100624
Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Commit-Queue: Qingsi Wang <qingsi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24837}
b49b8f115c