Testing - Android 9.x privacy - Google

Exit all of your apps and reboot the phone. Once the phone is to the home screen:

Go to Settings → Apps and Notifications → Google.app's info page.

Stop the google.app process.

Clear app cache

Clear app data

Go to app permissions.

Turn off all permissions listed in the google.app permissions section.

Disable Google.app.

Go to Settings → Apps and Notifications → show all apps → Google Play services → Permissions

Turn off all permissions to google play services.

Go to Settings → Apps and Notifications → show all apps → Action Services → Notifications

Turn off google play services notifications.

Reboot the phone.

Google play services can no longer collect data.