Rename PeerConnection::OnIceConnectionChange to OnIceConnectionStateChange
for consistency with the WebRTC 1.0 standard as suggested in a TODO.

BUG=None

Review-Url: https://codereview.webrtc.org/2732663004
Cr-Original-Commit-Position: refs/heads/master@{#17077}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 6dfd53a81ee7c6ce4c6536f3adc930a3755b6385
5 files changed