camera deduplication is broken for some devices

Some devices have multiple numbers in devices.devids:

        "device.api": "libcamera",
        "device.description": "Dell Webcam WB7022",
        "device.devids": "20736 20738 ",

Aside from the fact that device.devids should be a better formatted JSON array (to be fixed in pipewire), we also need to parse it as such and consider all the IDs in the deduplication logic. Currently we only accept 1 ID to be present there.

CC @ashoks