provide importUri for packages and include those suggestions

pkg/analysis_server/lib/src/services/completion/suggestion_builder.dart

Index: pkg/analysis_server/lib/src/services/completion/suggestion_builder.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/suggestion_builder.dart b/pkg/analysis_server/lib/src/services/completion/suggestion_builder.dart
index 5c572e43bf5ed535b0da3b860039745fca1cbc22..9dfdf2f8df35d350b576ed7b87b38a50a599a965 100644
--- a/pkg/analysis_server/lib/src/services/completion/suggestion_builder.dart
+++ b/pkg/analysis_server/lib/src/services/completion/suggestion_builder.dart
@@ -92,7 +92,7 @@ CompletionSuggestion createSuggestion(Element element,
         if (uriKind == UriKind.DART_URI) {
           suggestion.importUri = libSource.uri.toString();
         } else if (uriKind == UriKind.PACKAGE_URI) {
-          // TODO(danrubel) implement
+          suggestion.importUri = libSource.uri.toString();
         } else if (uriKind == UriKind.FILE_URI &&
             element.source.uriKind == UriKind.FILE_URI) {
           try {