Change: https://github.com/xamarin/java.interop/compare/3436a306bd23eb4755f769ad88d955323138321f...5bca8ad6e5cf28d1c1a0bac37d2e0aa311795aa8

  * xamarin/java.interop@5bca8ad6: [build] Automatically add NullableAttributes.cs for netstandard2.0 (xamarin/java.interop#1188)
  * xamarin/java.interop@45437e22: [Java.Interop] suppress IL3050 with `#pragma` (xamarin/java.interop#1201)
  * xamarin/java.interop@1c9c8c9c: [Java.Interop.Tools.Maven] Initial commit. (xamarin/java.interop#1179)

With xamarin/java.interop@5bca8ad6, all instances of nullable
attributes types defined in `NullableAttributes.cs` are now `internal`.

However, `Xamarin.Android.Build.Tasks` was consuming the `public`
types from its reference to `Java.Interop.Tools.JavaCallableWrappers`,
so this change resulted in a build break:

	MavenExtensions.cs(26,32): error CS0122: 'NotNullWhenAttribute' is inaccessible due to its protection level
	MamJsonParser.cs(92,43): error ...