This is an incredibly hard thing to setup because the documentation is so limited.
I believe you’re running from editor when you get the true response?
You must run from your phone and as a shipping build to test Google Play Services. So basically, you setup your Google Developer console, upload your first APK so that the Developer Console has your APKs fingerprint, then you compile future test builds as shipping and push them to your phone to test.
Here’s a VERY recent tutorial on setting up for Google Play. If you need any help let me know – I just got done doing this dance.