Fix ContextInfo example crashing on Android

Disabled desktop OpenGL renderer on android

Task-number: QTBUG-91627
Change-Id: I61ec7cc768d46c368dc0187714bd0bd085257a67
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

examples/opengl/contextinfo/widget.cpp

@@ -126,7 +126,9 @@ struct Renderable {
 
 static struct Renderable renderables[] = {
     { "default", QSurfaceFormat::DefaultRenderableType },
+#ifndef Q_OS_ANDROID
     { "OpenGL", QSurfaceFormat::OpenGL },
+#endif
     { "OpenGL ES", QSurfaceFormat::OpenGLES }
 };