Added gradle and cmake project

@@ -32,11 +32,11 @@
 /**
  * This interface collects the methods that are provided by both
  * GLXGraphicsConfig and WGLGraphicsConfig, making it easier to invoke these
  * methods directly from OGLSurfaceData.
  */
-interface OGLGraphicsConfig extends
+public interface OGLGraphicsConfig extends
     AccelGraphicsConfig, SurfaceManager.ProxiedGraphicsConfig
 {
     OGLContext getContext();
     long getNativeConfigInfo();
     boolean isCapPresent(int cap);