ofCubeMap::regenerateAllTextures() needs dummy implementation or Android-only declaration

[danomatika]

From checking ofxLua with the of_v20250319_osx_release nightly:

The ofCubeMap regenerateAllTextures static class function is declared in the header, however the implementation is only available for Android. There should be dummy implementation for other platforms or the declaration should be wrapped by #ifdef TARGET_ANDROID.

[danomatika]

I think wrapping the declaration for Android only is probably the way to go, this is how ofTexture does it.

[NickHardeman]

Wrapped in an Android define #8399