Feature: Improve Aparapi native to enforce Kernel and Device max work group size limitations and provide query functions for clGetKernelWorkGroupInfo through JNI Java calls

This feature is about enforcing the actual allowed Max Work Group size for a given Kernel and Device. This will allow to overcome issue #2 for BarrierSupportTest in Aparapi.

The other part of this feature is to provide query APIs to retrieve relevant parameters from clGetKernelWorkGroupInfo(..) of the OpenCL API.