new OAK-Thermal shows Connected cameras: [] in camera_preview.py 

```
kfinisterre@Seek0:~/depthai-python/examples/Camera$ python3 camera_preview.py 
Device name: OAK-T
Bootloader version: 0.0.28
Usb speed: UNKNOWN
Connected cameras: []
```
Followed by nothing

Likely related to: 
https://github.com/luxonis/depthai/issues/1218