New native plugin example do not work with OpenGL or OpenGL ES

Unity Engine
1

5.2 make a change to Native Plugin API, but as the doc says the example project works only on D3D or some OpenGL platforms. Run the project on OpenGL ES gets “s_DeviceType == kUnityGfxRendererNull”, does this mean OpenGL ES is not supported currently, any plan on this?

2

I have the same result with the 5.3.1f1. I just download the sample http://docs.unity3d.com/uploads/Examples/RenderingPluginExample53.zip from the doc and built it for android.
s_DeviceType is always affected to kUnityGfxRendererNull

3

5.4 will have full support for gles/metal in new rendering plugin interface