import all generated files in animated_icons_private_test (#14329)

packages/flutter/test/material/animated_icons_private_test.dart

@@ -21,8 +21,24 @@ import 'package:test/test.dart';
 
 part 'package:flutter/src/material/animated_icons/animated_icons.dart';
 part 'package:flutter/src/material/animated_icons/animated_icons_data.dart';
+
+// We have to import all the generated files in the material library to avoid
+// analysis errors (as the generated constants are all referenced in the
+// animated_icons library).
+part 'package:flutter/src/material/animated_icons/data/add_event.g.dart';
 part 'package:flutter/src/material/animated_icons/data/arrow_menu.g.dart';
+part 'package:flutter/src/material/animated_icons/data/close_menu.g.dart';
+part 'package:flutter/src/material/animated_icons/data/ellipsis_search.g.dart';
+part 'package:flutter/src/material/animated_icons/data/event_add.g.dart';
+part 'package:flutter/src/material/animated_icons/data/home_menu.g.dart';
+part 'package:flutter/src/material/animated_icons/data/list_view.g.dart';
 part 'package:flutter/src/material/animated_icons/data/menu_arrow.g.dart';
+part 'package:flutter/src/material/animated_icons/data/menu_close.g.dart';
+part 'package:flutter/src/material/animated_icons/data/menu_home.g.dart';
+part 'package:flutter/src/material/animated_icons/data/pause_play.g.dart';
+part 'package:flutter/src/material/animated_icons/data/play_pause.g.dart';
+part 'package:flutter/src/material/animated_icons/data/search_ellipsis.g.dart';
+part 'package:flutter/src/material/animated_icons/data/view_list.g.dart';
 
 class MockCanvas extends Mock implements ui.Canvas {}
 class MockPath extends Mock implements ui.Path {}