How to `mobile-install` a desugared app that has JDK 21 dependencies?

I'm building an app that depends on a library specifically built for JVM 21. As the java tools use JDK 17, there's an error from `DesugarDexSharding`:

```
Error: java.lang.IllegalArgumentException: Unsupported class file major version 65
```

What's the recommended way to deal with this, and what will be the eventual fix?

Start by reproducing the failure through mobile-install with a dependency built for JVM 21, then trace how the Java tools invoke DesugarDexSharding under JDK 17. Determine the supported way to handle class file major version 65 and document what eventual fix is required.

Written by the indexing model from the issue text.