Desktop SDK?

[jonpryor]

Related: #858

It would be nice to have a "more complete" Desktop SDK that supports Java code, akin to a (massive) subset of .NET Android. The infrastructure implicit to such a thing would also allow simplifying the (currently hardcoded) typemap entries within our unit tests.

For example, consider the various _CreateJavaCallableWrappers targets we currently have, which invoke jcw-gen. It would be handy to extend jcw-gen to also emit XML files containing the type mappings, so that all the unit tests don't need to provide their own separate typemap dictionaries; this could instead be (partially supported) by jcw-gen, which has all the information needed to emit typemap data already.

[jpobst]

Just in case you were going to work on this "soon", there is an extensive refactor in progress for jcw-gen that would likely make this task significantly easier: #1174.