Changing this requires changing the import path of the generated R file, which
will unnecessarily affect most of the code. R is built in a package based on
the AndroidManifest.xml package name, whereas the final app package name is
overridden in app/build.gradle for free and donate versions.

Untested, we need to find x86 and MIPS devices to test with.

maven-push.gradle source:
https://github.com/chrisbanes/gradle-mvn-push

Talked with zzz and did more research, the overhead of Enum is minimal compared
to the benefits it provides.