If the debris, or whatever this is, is not actually on the surface of the camera lens, then it is not going to have any effect whatsoever on use of the camera.
And in fact, thinking about it logically, it cannot be on the outer surface of the lens because if that were the case then it could be removed. It would have to be internal to the lens, between lens surfaces (are there multiple lens elements in these devices?) or between the inner surface of the lens and the image sensor such that it would interfere with photo taking.
I have to say, I would not have thought to make such a detailed examination of my own devices, checking for such minute defects.