[Feature Request] Camera selection improvement

[bdevay]

Is your feature request related to a problem? Please describe.
Barcode is mostly scanned with the back camera but the widget can't distinguish the cameras. I don't want to let the user selecting the proper camera because of a better UX.

Describe the solution you'd like
I need an interface to get which camera is the back and the selfie. At least, Android has this feature.

Describe alternatives you've considered
At least, since the barcode reader is usually used with the back camera, the widget should use the back camera by default.

Additional context
Not needed