WIP: Fix #16975 - OpenGL2 backend rendering with SWT

This merge request is meant to replace !4247 (closed)

I've applied the required changes to the Java wrapping CMakeList.txt to include jogl if VTK_JAVA_SWT_COMPONENT is on. Changes (as described here) for maven are not necessary as far as I can tell since the required files are the same as for VTK_JAVA_JOGL_COMPONENT.