Mark `StatusBar` API as unavailable on this platform

[okwasniewski]

Description

VisionOS doesn't have a concept of StatusBar. We can mark the API as unavailable.

[Aakashdeep-Srivastava]

lets do this... Assign it to me

[Marcoo09]

Can I take this issue or is it already done?

[okwasniewski]

Sure! Go ahead, it's not implemented