Improve scan QR code UX when camera access is turned off

[yahiheb]

This is what a user gets when they try to scan a QR code but the camera access setting on their device is off.

First screen:

Second screen:

Note: this is on Windows 10.

[soosr]

The DeviceTypes is VideoForWindows in that case, While on the other hand the actual camera's type is DirectShow.

@YohDeadfall
Do we know what VideoForWindows as a type means? Can we simply filter the devices by type?
.Where(x => x.DeviceType != DeviceTypes.VideoForWindows)

[YohDeadfall]

Sure, we can filter out that thing by doing a simple type check.