Clean up package imports and library names

pkg/analyzer/lib/src/generated/utilities_dart.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library engine.utilities.dart;
+library analyzer.src.generated.utilities_dart;
 
-import 'java_core.dart';
+import 'package:analyzer/src/generated/java_core.dart';
 
 /**
  * Check whether [uri1] starts with (or 'is prefixed by') [uri2] by checking
  * path segments.
  */
 bool startsWith(Uri uri1, Uri uri2) {
   List<String> uri1Segments = uri1.pathSegments;
   List<String> uri2Segments = uri2.pathSegments.toList();
   // Punt if empty (https://github.com/dart-lang/sdk/issues/24126)
   if (uri2Segments.isEmpty) {
@@ skipping 38 matching lines @@
   final bool isOptional;
 
   /**
    * Initialize a newly created kind with the given state.
    *
    * @param isOptional `true` if this is an optional parameter
    */
   const ParameterKind(String name, int ordinal, this.isOptional)
       : super(name, ordinal);
 }