Merge deep shortcuts in rounded rect

- DeepShortcutViews are added to ShortcutsItemView, which
  is in PopupContainerWithArrow
- Moved some shortcut-specific logic to ShortcutsItemView
  (namely, touch/long-click handling for draggin shortcuts)
- Moved round-rect clipping to PopupItemView
- Removed collapseToIcon() logic, including
  PillWidthRevealOutlineProvider, which was only used for
  that purpose. It isn't necessary now that the deep
  shortcuts have no background themselves.
- Replaced focus pill drawable with ripple effect on
  shortcuts and notification view.

Bug: 35766387
Change-Id: I6bc09f1851cfbb806df4bf75a6e435b0f1900c9c
diff --git a/res/layout/notification.xml b/res/layout/notification.xml
index 48c7b48..e148cbb 100644
--- a/res/layout/notification.xml
+++ b/res/layout/notification.xml
@@ -17,7 +17,7 @@
 <com.android.launcher3.notification.NotificationItemView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/notification_view"
-    android:layout_width="@dimen/bg_pill_width"
+    android:layout_width="@dimen/bg_popup_item_width"
     android:layout_height="wrap_content"
     android:elevation="@dimen/deep_shortcuts_elevation"
     android:background="@drawable/bg_white_round_rect">