[Java.Interop] Use PublicApiAnalyzer to ensure we do not modify public API

[jpobst]

Context: dotnet/android#8171

Like Mono.Android.dll, we consider the Java.Interop.dll public API of each target framework to be an immutable contract. For example, this prevents an issue where a user on .NET 8.0.300 uses a method that isn't available to their coworker or CI on .NET 8.0.100.

Thus we should enable PublicApiAnalyzer on Java.Interop.dll to ensure we do not break our contract.