* Filter candidate after setting description
* comment
* Fix filtering candidates
- For offer/answer from remote, do filtering before setting remote
description so that Pion does not see filtered candidates
- For offer/answer originating from server, do filtering after setting
local description (comments in code) so that remote side does not
see filtered candidates.
- Make logging a little consistent and use right context.
* Comment
* TCP fallback config and UT (broken now)
* log SDP only when preferring TCP
* Remove TCP fallback test attempt