Use case

Right now, the cameraDescription is set when you create a new CameraController instance, and you can't change it after that. Sometimes, when I record a video, I want to be able to switch from the front-facing to the back-facing camera mid-recording to show something. Certain packages like camerawesome allow that but only on iOS.

Proposal

Add a setCamera(CameraDescription) method to CameraController, that can be called while recording, or at the very least when the controller is paused so that we can pause, switch and resume in the same file.