> They're in clear violation of the GPLv2 now.
I don't think they are? They could just as easily require requests for the source code to be made through the regular mail instead of a Google form. It's still (maliciously) compliant with the license.
There's an easy way to put them into compliance violation:
Get a large brigade of android users to request access to source on each security update.
> I don't think they are?
If filling out the source code request form via Google Forms and/or accessing the download link via Google Drive requires the requester to run non-free (or at least non-GPLv2) JavaScript, then maybe it is in violation of section 6 of the GPLv2 ("You may not impose any further restrictions on the recipients' exercise of the rights granted herein") since the requester is then required to accept an entirely different set of licensing terms and conditions.