[AppKit/UIKit] Share the implementation of more enums between AppKit and UIKit.

[rolfbjarne]

Second group of enums (there will be more!)

There should be no breaking changes.

[vs-mobiletools-engineering-service2]

❌ [PR Build] Tests failed on Build ❌

Tests failed on Build.

• Azure DevOps
• Html Report (VSDrops)

API diff

✅ API Diff from stable

View API diff

• iOS vsdrops gist
• macOS vsdrops gist
• macCat vsdrops gist
• macCatiOS gist
• tvOS vsdrops gist
• watchOS vsdrops gist

API & Generator diff

✅ API Diff (from PR only) (no change)
ℹ️ Generator Diff (please review changes)

GitHub pages

Results can be found in the following github pages (it might take some time to publish):

• Test results
• API diff
• API & Generator diff

Test results

2 tests failed, 87 tests passed.

Failed tests

• monotouch-test/Mac Catalyst/Debug [dotnet]: Failed (Tests run: 2629 Passed: 2491 Inconclusive: 35 Failed: 2 Ignored: 136)
• link sdk/Mac Catalyst/Debug [dotnet]: Failed (Tests run: 129 Passed: 105 Inconclusive: 6 Failed: 1 Ignored: 23)

Pipeline on Agent XAMBOT-1100.BigSur'
Merge 7f1c58a into 23d3fa5

[rolfbjarne]

Test failures are unrelated:

• monotouch-test/Mac Catalyst/Debug [dotnet]: https://github.com/xamarin/maccore/issues/2471
• link sdk/Mac Catalyst/Debug [dotnet]: https://github.com/xamarin/maccore/issues/2472