Bump to xamarin/Java.Interop/d16-7@1f3388af

Changes: dotnet/java-interop@76d1ac7...1f3388a

  * dotnet/java-interop@1f3388a: [generator] Use proper syntax for nested classes for DIM invokers (dotnet#662)
  * dotnet/java-interop@5e23163: [generator] Support XML defined enums with no JNI info (dotnet#659)
  * dotnet/java-interop@5c4581d: [generator] Don't invalidate interface if static method is invalidated (dotnet#660)
  * dotnet/java-interop@9687bb5: Bump to xamarin/xamarin-android-tools/d16-7@017078f2 (dotnet#658)
  * dotnet/java-interop@abfade5: [Java.Interop] Fix C# warnings (dotnet#652)
  * dotnet/java-interop@fb6d5f9: [Java.Interop.Tools.Generator] Specify $(OutputPath) (dotnet#650)
  * dotnet/java-interop@a3f148c: [Xamarin.Android.Tools.Bytecode] Support @jvmoverloads (dotnet#651)