Fix regression in import fixups introduced by .packages support.

pkg/analysis_server/lib/src/services/correction/util.dart

Index: pkg/analysis_server/lib/src/services/correction/util.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/util.dart b/pkg/analysis_server/lib/src/services/correction/util.dart
index c4082fa4765f599d1158f5dad493042ce6abf6ff..1af70b001146adf4e6552c3be9d54faef1ab1715 100644
--- a/pkg/analysis_server/lib/src/services/correction/util.dart
+++ b/pkg/analysis_server/lib/src/services/correction/util.dart
@@ -104,10 +104,11 @@ Expression climbPropertyAccess(AstNode node) {
  *
  * Returns the absolute (non-file) URI or `null`.
  */
-String findAbsoluteUri(AnalysisContext context, String path) {
-  Source fileSource = new NonExistingSource(path, null, UriKind.FILE_URI);
+String findNonFileUri(AnalysisContext context, String path) {
+  Source fileSource =
+      new NonExistingSource(path, toUri(path), UriKind.FILE_URI);
   Uri uri = context.sourceFactory.restoreUri(fileSource);
-  if (uri == null) {
+  if (uri == null || uri.scheme == 'file') {
     return null;
   }
   return uri.toString();