Currently, the Android SDK is pretty difficult to integrate into existing applications. It would be very nice to distribute the library as a JAR which could be easily integrated into an existing Android project. Additionally, the JAR could be uploaded to a maven repository and easily added to a Gradle or Maven build.
Currently, the upgrade process is very difficult as we have to copy many files into the resources directory, as well as copying values into the strings.xml, etc. This could be much easier with an Android shared library!