If the car is camouflaged, then it means something about the design isn't ready for public release. This Rolls most likely is a preproduction prototype from Rolls Royce itself rather than something like a Waymo autonomous Jaguar converted to self driving by an aftermarket operator. It may be that Rolls Royce and its parent, BMW, are testing technology integration for future production, and it might debut on whatever next-generation Cullinan we're seeing in this image.
Best,
Tim