fix for iOS 16 - force safeAreaInsets update

[a-neuses]

Checklist

• All tests are passed.
• Added tests or Playbook scenario.
• Documented the code using Xcode markup.
• Searched existing pull requests for ensure not duplicated.

Description

• In iOS 15, setting isHidden to false on a UIWindow triggers an update to the safeAreaInsets on the view of the window's rootViewController. In iOS 16 (and the 17 beta), this update was not happening. So calculating additionalSafeAreaInsets was happening with safeAreaInsets == .zero instead of the correct value.

Related Issue

N/A

Motivation and Context

There were issues with layout of AccessibilitySnapshot. This led to a detailed investigation of the root cause and this pull request.

Screenshots

Screenshots of debugging the calculation of additionalSafeAreaInsets in SnapshotWindow.swift

iOS 15

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iOS 16

[ra1028]

Thanks @a-neuses