* fix(edge): get p2p working up to ice failure

Edge does not support trickle ice. In an attempt to work around
such, and get p2p working, some other work was needed to even
get to the point of ice failure. This is that some other work.

* squash: fix typos, no intermediary map

* squash: remove extra line break

In order to include browser capabilities in RTCBrowserType I needed to
refactor RTCBrowserType.