Under licensing requirements, anyone using the code must make it accessible to the public, which Trump is ignoring.

Google will do anything it can to get apps on its store, but let's face it, Apple has the better apps. Because Apple has the better apps, they want to choke off Android while trying to incentivize more devs to make apps for them, so they have a client stack that is as different from Google's as possible to make it hard for devs to switch over.