Using the new Java class analyzer API, scan the bound packages for references to Java classes and interfaces and generate Go wrappers for them. This is the second part of the implementation of proposal golang/go#16876. For golang/go#16876 Change-Id: I59ec0ebdae0081a615dc34d450f344c20c03f871 Reviewed-on: https://go-review.googlesource.com/28596 Reviewed-by: David Crawshaw <crawshaw@golang.org>