"[T]his section of the privacy page on the Google account settings website is only showing up for those that have played on iOS and signed in using the Google button. Android users who used the same login method are not seeing the “Pokemon Go Release” at all on the permissions site (nor do they see Ingress), so we’re not sure yet if those users have trusted Niantic with their entire Google account as well." source: http://9to5google.com/2016/07/11/psa-pokemon-go-full-access-...
Yeah it's not showing anything in my google app permissions. I assume it signed in using google play services (it was automatic, I never selected anything), and that's where the in app purchases seem to go.