Honghai Zhang 4cedf2b78c Add signaling to support ICE renomination.
By default, this will tell the remote side that I am supporting ICE renomination.
It does not use ICE renomination yet even if the remote side supports it.

R=deadbeef@webrtc.org, pthatcher@webrtc.org, skvlad@webrtc.org

Review URL: https://codereview.webrtc.org/2224563004 .

Cr-Commit-Position: refs/heads/master@{#13998}
2016-08-31 15:18:22 +00:00
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