The repo includes basic examples like creating a package and importing it. Using the android.toolchain.cmake file from the official Android repository(using NDK16) one can import existing C++ source code to android platform(generating some shared libraries and associated header files). I'm willing to do the same for ViSP.
Begin from the example in AndroidCMake directory. It imports a simple package called Foo for android.
Later you can try building OpenCV for android - I'm currently trying to edit some cmake files to exclude some third party libraries for OpenCV.
I haven't started neither the java nor the build_sdk.py part yet. Currently I'm adding build flags to cmake files for android platform.