Adds ash_mus_unittests to FYI bot

ash/wm/window_cycle_controller_unittest.cc

Index: ash/wm/window_cycle_controller_unittest.cc
diff --git a/ash/wm/window_cycle_controller_unittest.cc b/ash/wm/window_cycle_controller_unittest.cc
index c0290eefb83ab917be5828304e58d12effe6e3d1..fb1cca2b36f4a71f32a6f4add0bc056d71a51cfe 100644
--- a/ash/wm/window_cycle_controller_unittest.cc
+++ b/ash/wm/window_cycle_controller_unittest.cc
@@ -492,7 +492,8 @@ TEST_F(WindowCycleControllerTest, SelectingHidesAppList) {
 
   std::unique_ptr<aura::Window> window0(CreateTestWindowInShellWithId(0));
   std::unique_ptr<aura::Window> window1(CreateTestWindowInShellWithId(1));
-  app_list_presenter_impl.Show(display_manager()->first_display_id());
+  app_list_presenter_impl.Show(
+      display::Screen::GetScreen()->GetPrimaryDisplay().id());
   EXPECT_TRUE(app_list_presenter_impl.IsVisible());
   controller->HandleCycleWindow(WindowCycleController::FORWARD);
   EXPECT_FALSE(app_list_presenter_impl.IsVisible());