it means you can't code against some library without permission from the copyright holder
Which is exactly how GPL works. You can't link a GPL library ("covered work") without abiding to the GPL license. If Google wins, it means you can use GPL libraries ignoring the GPL license wholly - after all you're just calling APIs. In the worst case, just make a dual licensed API facade.
It's exactly the Ubuntu ZFS situations. Does ZFS modifies the kernel? No, it doesn't. It just a module calling kernel APIs. Some APIs are restricted use - but that restricted use is based on APIs copyright.
Sometimes, it would be useful if FOSS supporters spent some time to actually read and understand FOSS licenses, instead of blinding believing in them as if they were an holy book and they can access only some priesthood "explanation"....