It seems like somebody got too easy access to the Google Github repo. Usually only higher quality projects get approved to the central repo.
Since Google owns the copyright it almost makes sense.
Also, being in the Google organization doesn't mean that Google is involved in it. I'm maintaining a project there (`google/double-conversion`), despite not having worked for Google for years. Nobody at Google has any influence or reviews on that project.
And Google is not really known to release high quality projects overall. Only some of them are.