Originally Posted by
Saracen
More than that. Google is and has been shifting more and more core services into "Google" Android, and then abandoning the original, and open-source, AOSP (Android Open Source Project) variants.
Bear in mind, the original Android was open source, and in theory, still is. BUT, if an OEM wants access to the Google bits, like oh, Play Store apps, YouTube, GMail, cloud-syncing, Google Maps APIs or overlays, or GPS location data, etc, then as Google moves more and more of the updated versions of these functions into reliance on Play Services, then those OEMs either have licence from Google, or develop ALL of these services themselves if they stick with the AOSP Android fork, and provide the infrastructure, or licence the data from someone else ....short of, oh, going out and mapping the world themselves, for instance.