Don't attempt to create a file for non-Dart imports.

pkg/analysis_server/test/services/correction/fix_test.dart

Index: pkg/analysis_server/test/services/correction/fix_test.dart
diff --git a/pkg/analysis_server/test/services/correction/fix_test.dart b/pkg/analysis_server/test/services/correction/fix_test.dart
index b9b68572ed932a35be08a129674d021e1d615ce1..a54eb0085168550511eccd2fab76a53f3c558375 100644
--- a/pkg/analysis_server/test/services/correction/fix_test.dart
+++ b/pkg/analysis_server/test/services/correction/fix_test.dart
@@ -1493,6 +1493,23 @@ import 'my_file.dart';
     expect(fileEdit.edits[0].replacement, contains('library my_file;'));
   }
 
+  test_createFile_forImport_BAD_inPackage_lib_justLib() async {
+    provider.newFile('/projects/my_package/pubspec.yaml', 'name: my_package');
+    testFile = '/projects/my_package/test.dart';
+    resolveTestUnit('''
+import 'lib';
+''');
+    await assertNoFix(DartFixKind.CREATE_FILE);
+  }
+
+  test_createFile_forImport_BAD_notDart() async {
+    testFile = '/my/project/bin/test.dart';
+    resolveTestUnit('''
+import 'my_file.txt';
+''');
+    await assertNoFix(DartFixKind.CREATE_FILE);
+  }
+
   test_createFile_forImport_inPackage_lib() async {
     provider.newFile('/projects/my_package/pubspec.yaml', 'name: my_package');
     testFile = '/projects/my_package/lib/test.dart';