When the two types have the same name but are from different libraries
showing the library URI will help users understand the failure better.
Change-Id: I5ab4412e676272111d41f688ef2d1cc83afbe627
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/194116
Reviewed-by: Mark Zhou <markzipan@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>
