Looking at Nokia's dev docs: http://developer.nokia.com/nokia-x/platform-overvie...

kllrnohj on Feb 24, 2014 | parent | context | favorite | on: Nokia announces the X and X+, its first Android ph...

Looking at Nokia's dev docs: http://developer.nokia.com/nokia-x/platform-overview

It looks like the "three APIs" are not Android APIs, but rather Google Play Services APIs. Specifically push notifications, maps, and in-app payments.