Remove NativeAOT workaround after runtime#128020 flows in

## Follow-up

Remove the workaround added in https://github.com/dotnet/android/pull/11317 once https://github.com/dotnet/runtime/pull/128020 has flowed into this repo through the normal Maestro dependency update.

## Background

`dotnet/runtime#128020` works around the illink issue that required the `dotnet/android#11317` workaround. After a Maestro update brings that runtime change into `dotnet/android`, the local workaround should no longer be needed.

## Done when

- The Maestro dependency update containing `dotnet/runtime#128020` has merged into `dotnet/android`.
- The workaround from `dotnet/android#11317` is removed.
- Relevant NativeAOT/trimmable typemap validation still passes.