main/patch obb files in Android

This is not a bug, but more a feature request. The implementation of the OBB file finder is not as expected. See https://developer.android.com/google/play/expansion-files.html#ReadingTheFile

Your implementation only returns a main.obb file, but an Android app can have two OBB files (main and patch). The second file is completely ignored, if it exists. And with your implementation the user has always to download the large main.obb instead of a much smaller patch.obb.