Support track level stereo and red setting (#470)
* Support track level stereo and red setting
* check stereo is already exist
* move options calc to publishTrack
* prettier
* Move all logic into `publishTrack` and set explicit defaults (#474)
* Move all logic into and set explicit defaults
* remove unnecessary null check
* fix check
* only log warning when red or dtx aren't set
* not disable red in stereo by default
* Update src/room/participant/LocalParticipant.ts
Co-authored-by: David Zhao <dz@livekit.io>
Co-authored-by: lukasIO <mail@lukasseiler.de>
Co-authored-by: David Zhao <dz@livekit.io>
