Add the notification manager

pkg/analysis_server/test/src/plugin/test_all.dart

Index: pkg/analysis_server/test/src/plugin/test_all.dart
diff --git a/pkg/analysis_server/test/src/plugin/test_all.dart b/pkg/analysis_server/test/src/plugin/test_all.dart
index 80373223ef49586303d00f9402fc19efac8f5534..c99ac53aaa5cdc7a1a2a8bbce971cac38820382a 100644
--- a/pkg/analysis_server/test/src/plugin/test_all.dart
+++ b/pkg/analysis_server/test/src/plugin/test_all.dart
@@ -4,6 +4,7 @@
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
+import 'notification_manager_test.dart' as notification_manager_test;
 import 'plugin_locator_test.dart' as plugin_locator_test;
 import 'result_collector_test.dart' as result_collector_test;
 import 'result_converter_test.dart' as result_converter_test;
@@ -11,6 +12,7 @@ import 'result_merger_test.dart' as result_merger_test;
 
 main() {
   defineReflectiveSuite(() {
+    notification_manager_test.main();
     plugin_locator_test.main();
     result_collector_test.main();
     result_converter_test.main();