Use more concise names for libraries.

[tux-mind]

When a project had more libraries with the same name, fat-aar will overwrite all except the last, resulting in a broken aar.

With this modifications it will prepend the artifact group to avoid name clash. The same has been made for jars, not only android libraries.

[alixwar]

Why have you downgraded the Android Gradle Plugin?

//    compile 'com.android.tools.build:gradle:2.3.0'
    compile 'com.android.tools.build:gradle:2.2.3'