This time I included the accessibility changes, which required adding some of the new accessibility features in other parts of the code. Note, there are cases where not all of the accessibility was brought over because that was supposed to be covered in a separate PR made by someone from Google.

This test passes on master but fails on the merge branch. Looking at the snapshot difference, it appears that google figured out a way to get more characters in before truncating. The text is still within its provided max size.

… collision (TextureGroup#2020)

As of iOS15 the AuthenticationServices framework has a class named `ASNavigationController`. We need to rename our `ASNavigationController` to protect against undefined behavior.

Note: This change was based on this PR TextureGroup#2014. We were slow in merging it and the author has not replied, so I'm making a new one to get this landed.

With the breaking change of renaming ASNavigationController to ASDKNavigationController, we have released a new version of Texture. Please see `ThreeMigrationGuide.md` for how to handle the breaking changes in 3.1.0.

- The framework isn't available on tvOS. This causes CocoaPods linting to fail which prevented me from pushing the new release out.
- One way to fix this is to have a different `default_subspecs` for tvOS that doesn't have AssetsLibrary subspec, but per-platform `default_subspecs` doesn't seem to be supported by CocoaPods. So I updated the subspec itself to only depend on the framework for iOS. This means the subspec is empty/useless for tvOS (and other platforms FWIW).
- Tested with `pod spec lint Texture.podspec`.
- Fixes TextureGroup#1992 and part of TextureGroup#1549. Also unblocks 3.1.0 release.
- For the long term, we can remove the subspec entirely when iOS 9 is deprecated (TextureGroup#1828).

It looks like github updated so that `macos-latest` is now macos-11. It can't find Xcode_11_5. Let's try to set the runs-on version explicitly and see if some magic happens.

also allow warnings for podlint because that started failing too