Rename RTCCodecStats.codec -> mimeType, parameters -> sdpFmtpLine.

As per https://github.com/w3c/webrtc-stats/pull/168.

NOTRY due to broken linux_ubsan_vptr, all other tests passed.

BUG=webrtc:7061
NOTRY=True

Review-Url: https://codereview.webrtc.org/2718383002
Cr-Original-Commit-Position: refs/heads/master@{#16907}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 13f54b2c5684119a1b31f172b3745cbec7229ebb
5 files changed