The helper will be removed in one of the future releases.
Consumer apps are responsible for acquiring a media stream,
which can then be supplied to createMediaStreamSource.
Parameters
constraints: MediaStreamConstraints = ...
Specify contraints used to get a MediaStream from a media device. By default we simply request
a video stream.
Create a CameraKitSource from a user's media device -- this calls MediaDevices.getUserMedia to get a MediaStream and then calls createMediaStreamSource.
Deprecated
The helper will be removed in one of the future releases. Consumer apps are responsible for acquiring a media stream, which can then be supplied to createMediaStreamSource.