Some of the availability attributes are from earlier OS versions, but
it's what the headers + Apple's documentation say.
Note: there were no changes in beta 2, beta 3, beta 4, beta 5 or beta 6.
- Fixes https://github.com/xamarin/xamarin-macios/issues/14450
- There is a significant amount of additional bindings to be done, but this way
we at least get the trivia one in now.
Co-authored-by: Rolf Bjarne Kvinge <rolf@xamarin.com>