Undistort OAK-D rgb camera in AR examples

[kaatrasa]

Currently, we render AR objects with undistorted pinhole model, but the background image is still distorted in live examples (mixed_reality.py & mapping_ar.py). Now the color image is undistorted on the OAKD device and then converted from YUV to RGB using ImageManip nodes. Seems to work on my OAK-D, but ideally we should test on OAK-D Pro W.