fix: Add StatusBar.currentHeight support for iOS platform (#41663)

[Romick2005]

Summary:

Add StatusBar.currentHeight support for iOS platform.

Changelog:

Use NativeStatusBarManagerIOS.getConstants().HEIGHT to get iOS StatusBar height value.

[IOS] [FIXED] - StatusBar currentHeight property.

Test Plan:

import { StatusBar } from "react-native";

console.log({ currentHeight: StatusBar.currentHeight });

Before:
{"currentHeight": null}
After:
{"currentHeight": 44}