> (1) for the purposes of allowing Google and the Judges to evaluate and test the Device for purposes of the Contest, and
(2) in connection with advertising and promotion via communication to the public or other groups, including,
but not limited to, the right to make screenshots, animations and device clips available for promotional
purposes
In other words they only get rights related to this contest, they cannot do anything beyond the contest with your IP.
I originally read that part as applying only to the 'display' part of the rights clause. Reading it again, I think you are right - perhaps Google really is getting zero licensing rights out of the contest.
> (1) for the purposes of allowing Google and the Judges to evaluate and test the Device for purposes of the Contest, and (2) in connection with advertising and promotion via communication to the public or other groups, including, but not limited to, the right to make screenshots, animations and device clips available for promotional purposes
In other words they only get rights related to this contest, they cannot do anything beyond the contest with your IP.