Support macOS 12.0 (Monterey) for Macs that include a camera housing in the bezel

The next version of macOS will have an API to get info about camera position on Macs that include a camera housing in the bezel ([source](https://www.macrumors.com/2021/10/19/macos-app-compatibility-mode-notch/)) + ability to toggle "compatibility mode" for apps.

I suppose that this extension should support it.

Documentation: https://developer.apple.com/documentation/bundleresources/information_property_list/nsprefersdisplaysafeareacompatibilitymode

Start with the extension repository and the linked Apple Information Property List documentation to determine the required macOS 12 compatibility behavior. Confirm what support means for this extension and verify it on a Mac with a camera housing; the issue provides no file or test entry point.

Written by the indexing model from the issue text.