Minor, uncontroversial changes

[SWinxy]

I've made some changes that I hope you have no objections to. Here's a list of those changes:

• Instance.java no longer calls vkEnumerateInstanceLayerProperties() with an integer array, instead now with an IntBuffer.
• Window class doesn't need to implement GLFWFramebufferSizeCallbackI, since the invoke() method would never have been called anyway.
• Reworked getting instance layer names to something a little more readable. Rather than using arrays of arrays, check if the layer is present, and return that.
• Sorted fields in a consistent manner (static final, then final, then mutable). IDEA shouldn't interfere with them.
• Inlined the return of createDebugCallBack().

Lmk what you think.

[lwjglgamedev]

Thanks ! Amazing work.

At a first look it seems good to me. Please, let me review the changes and I will integrate the changes. (I mayneed some days. Too much work this week). I will not make any more code modifications until this is merged.

Thanks again.

[SWinxy]

No worries. Take your time.

[SWinxy]

Awesome. You're not going to like the next PR I have in mind.