In some cases, we don't want the cv requirement to get an image, for instance interop with other versions of opencv
This enables getting a raw image, and handling conversions from the user side.
This is primarily for use on Linux to get by-id or by-path device names.
This information is now part of UsbCameraInfo.
A new entry point was added to UsbCamera to get that camera's UsbCameraInfo.
The alternate paths are also returned in EnumerateUsbCameras.
