Merge "Fixed a crash when dumping groupmanager" into nyc-dev am: 95b3120d08

am: 2e0e23b684

* commit '2e0e23b68473da94b7d5abda66735e7f1d9f619d':
  Fixed a crash when dumping groupmanager

Change-Id: Ic6e6e07b46c1dc20e16f472982bd3f63e0e03311

packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationGroupManager.java

@@ -459,7 +459,8 @@ public class NotificationGroupManager implements HeadsUpManager.OnHeadsUpChanged
 
         @Override
         public String toString() {
-            String result = "    summary:\n      " + summary.notification;
+            String result = "    summary:\n      "
+                    + (summary != null ? summary.notification : "null");
             result += "\n    children size: " + children.size();
             for (NotificationData.Entry child : children) {
                 result += "\n      " + child.notification;