Island for Android

Island depends on "deagle" library, which must be cloned alongside Island in the same path.

\--
  \- island
  \- deagle

This project is constructed into several modules, with assembly module as the build portal, to support separate "light" build for core modules, in the form of "product flavor" in Gradle build configuration.

The "engine" module shares the same package name with the "complete" build, to inherit the profile/device owner privilege. The "mobile" and other modules can be installed and updated separately alongside "engine" module for development convenience.