xuning / livekitAndroidXuningTest

* Use flow delegate to enable usage of flow observing in compose

* Make tracks flowable as well

* Compose sample

* documentation for flowable variables

* clean up dev change

* basic event bus implementation

* automatic video track management

* fix tests

* clean up import

This reverts commit c4bd6189.

This reverts commit f00bfde0.

* connect options and publish defaults

* default capture options

* more higher level track apis

* selecting camera by deviceId

* fix tests

* connection quality api

* fix room test

* add in listener for connection quality

* mock e2e tests

* fix peer connection mock initialization

* update protocol submodule commit

* Handle room metadata updates

* screencast implementation

* update usage comment

* fill in track source parameter

* Make screenCaptureConnection.stop() idempotent

* minor cleanup

* update compose sample application to include screenshare

* fix tests

* update protocol submodule commit

* Add option to control DTX (Discontinuous Transmission)

* Network monitoring tool to measure tx stats

* Move network monitor into sdk for now

* Use LKLog instead of timber

* bringing in audio/video perms into sdk and documentation

* Update README.md