Enable bounce animation for screen capture tray button

Bug: 1137533
Change-Id: Iafdae4693b0fa67a7e187692ca566e1b832fd688
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626967Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843286}

ash/capture_mode/stop_recording_button_tray.cc

@@ -31,6 +31,8 @@ StopRecordingButtonTray::StopRecordingButtonTray(Shelf* shelf)
   image_view->SetVerticalAlignment(views::ImageView::Alignment::kCenter);
   image_view->SetPreferredSize(gfx::Size(kTrayItemSize, kTrayItemSize));
   tray_container()->AddChildView(std::move(image_view));
+
+  set_use_bounce_in_animation(true);
 }
 
 StopRecordingButtonTray::~StopRecordingButtonTray() = default;