Merge "Store notification keys in a List instead of a Set." into ub-launcher3-master

diff --cc src/com/android/launcher3/notification/NotificationFooterLayout.java
index 13eaa9a,eef1d61..cd610bd
--- 1/src/com/android/launcher3/notification/NotificationFooterLayout.java
--- 2/src/com/android/launcher3/notification/NotificationFooterLayout.java
+++ b/src/com/android/launcher3/notification/NotificationFooterLayout.java
@@@ -40,10 -40,10 +40,9 @@@ import java.util.HashMap
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
- import java.util.Set;
  
  /**
 - * A {@link LinearLayout} that contains icons of notifications. If there is only one icon,
 - * we also supply the notification text/secondary text like we do for the main notification.
 + * A {@link LinearLayout} that contains only icons of notifications.
   * If there are more than {@link #MAX_FOOTER_NOTIFICATIONS} icons, we add a "+x" overflow.
   */
  public class NotificationFooterLayout extends LinearLayout {