StatusBarBehavior using obsolete iOS components

[bijington]

Currently in the codebase we receive the following warnings:

• UIApplication.SharedApplication.Windows - "Use 'UIWindowScene.Windows' in the desired window scene object instead.
• UIApplication.SharedApplication.StatusBarFrame - "Use the 'StatusBarManager' property of the window scene instead."

Things appear to work for now but I suspect we should look to move to the recommended approach