toggleCamera method Null safety
Function to toggle enable/disable the camera
Implementation
void toggleCamera() async {
var status = await Permission.camera.status;
if (value.isLocalVideoDisabled && status.isDenied) {
await Permission.camera.request();
}
value = value.copyWith(isLocalVideoDisabled: !(value.isLocalVideoDisabled));
value.engine?.muteLocalVideoStream(value.isLocalVideoDisabled);
}