Test `EGL_OPENGL_ES3_BIT_KHR` against `rendererType`, not `conformant`.

src/libANGLE/validationEGL.cpp

@@ -763,7 +763,7 @@ Error ValidateCreateContext(Display *display, Config *configuration, gl::Context
             {
                 return EglBadConfig();
             }
-            if (!(configuration->conformant & EGL_OPENGL_ES3_BIT_KHR))
+            if (!(configuration->renderableType & EGL_OPENGL_ES3_BIT_KHR))
             {
                 return EglBadConfig();
             }