The other thing to consider is, who would have standing to sue for their copyrights being violated and would have a desire to sue Google in what would be a risky lawsuit with little upside for the filer even if they win? The sets of "people with standing" and "people with any desire to sue Google for this" seem disjoint.
I don't know anything about the people who initially brought up the potential copyright infringement, but it seems like the only potential beneficiaries of the allegation are folks who would like companies to worry about Android's IP footing.
