Add Firefox versions for RTCPeerConnection API (#12853)
Add Firefox versions for RTCPeerConnection API (#12853)

This PR adds real values for Firefox and Firefox Android for the `RTCPeerConnection` API, based upon results from the [mdn-bcd-collector](https://mdn-bcd-collector.appspot.com) project (v3.3.0).

Tests Used: https://mdn-bcd-collector.appspot.com/tests/api/RTCPeerConnection
chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data