Improve support for Android intermediate generated sources

[Tanish-Ranjan]

Android generates a lot of intermediate sources such as AIDL, Render script, C/CPP, etc. Unfortunately AGP doesn't provide any APIs to retrieve these files. R.jar is one of these intermediate sources which is crucial for Android development so as a workaround in #173 I have retrieved the file using the process task for the build variant however, in some cases the task may not be registered during the sync in which case the dependency for R.jar is not provided.