Enable missed tests

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 c99ac53aaa5cdc7a1a2a8bbce971cac38820382a..9da4fdc7f3d58daeb674abbaf42a59d10f74a103 100644
--- a/pkg/analysis_server/test/src/plugin/test_all.dart
+++ b/pkg/analysis_server/test/src/plugin/test_all.dart
@@ -6,6 +6,8 @@ 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 'plugin_manager_test.dart' as plugin_manager_test;
+import 'plugin_watcher_test.dart' as plugin_watcher_test;
 import 'result_collector_test.dart' as result_collector_test;
 import 'result_converter_test.dart' as result_converter_test;
 import 'result_merger_test.dart' as result_merger_test;
@@ -14,6 +16,8 @@ main() {
   defineReflectiveSuite(() {
     notification_manager_test.main();
     plugin_locator_test.main();
+    plugin_manager_test.main();
+    plugin_watcher_test.main();
     result_collector_test.main();
     result_converter_test.main();
     result_merger_test.main();