Clean up package imports and library names

pkg/analyzer/test/src/task/test_all.dart

 // Copyright (c) 2015, 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 test.src.task.test_all;
+library analyzer.test.src.task.test_all;
 
 import 'package:unittest/unittest.dart';
 
 import '../../utils.dart';
 import 'dart_test.dart' as dart_test;
 import 'dart_work_manager_test.dart' as dart_work_manager_test;
 import 'driver_test.dart' as driver_test;
 import 'general_test.dart' as general_test;
 import 'html_test.dart' as html_test;
 import 'html_work_manager_test.dart' as html_work_manager_test;
@@ skipping 18 matching lines @@
     html_work_manager_test.main();
     incremental_element_builder_test.main();
     inputs_test.main();
     manager_test.main();
     model_test.main();
     options_test.main();
     options_work_manager_test.main();
     strong_mode_test.main();
   });
 }