revert: java bindings become CMake modules (loadable plugins)
revert: java bindings become CMake modules (loadable plugins)

This reverts part of commit 0db10a3052a33c7326517e8140e36d46d430a3f5

opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv