Fix Configuration for Xamarin.Android.sln

[dellis1972]

If you loaded the .sln in Xamarin studio it defaults to the
Debug configuration. As a result the Java.Interop project is
NOT built as part of that configuration. This is because it was
looking for a Mapping that did not exist in that project.

While it didn't stop the build, it did looks odd and might cause
confusion for users.

Other configurations have also been updated to make sure all the
projects are building the correct projects

[jonpryor]

How was the configuration "broken"? What IDE reported warnings, and what were those warnings?

[dellis1972]

@jonpryor updated with comments :)

[jonpryor]

As a result the Java.Interop project is NOT built as part of that configuration.

Java.Interop isn't supposed to be built in the Debug configuration. It shouldn't be built in any Xamarin.Android configuration...except by Mono.Android.targets as a BeforeResolveReferences target, which ensures that the correct Java.Interop configuration is built.

(The reason/rationale for this is that the original Java.Interop Debug configuration was "green field let's reimplement everything!", and when Cycle 7 had the opportunity for integration I didn't want to bring in everything -- it would be too destabilizing -- so Java.Interop got the XAIntegrationDebug and XAIntegrationRelease configurations, for use with Xamarin.Android. Perhaps now that should be reversed, with the Java.Interop Debug/Release configurations being for Xamarin.Android use, and some other configuration name for "let's include the kitchen sink!" For now, though, we have what we have.)

[jonpryor]

As per previous comment, this line shouldn't be added.