Those are services that can be provided by others on any Android device, including those sold by Google. The fact that others aren't providing those services do

Those are services that can be provided by others on any Android device, including those sold by Google. The fact that others aren't providing those services doesn't mean Android itself is meant to lock in users (or to collect data / serve ads), only that others haven't found a reason to provide those services. Google also provides many of those services on other OSes it does not develop (e.g., Chrome push notifications and Widevine).