Implement settings affordance in header.

Also, the status icons are hidden when quick settings is expanded,
except for the battey indicator.

Change-Id: I6fb130c7eb73445b2ec2fdf9a9f3ec181d98033d
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
index 9b360cf..2d96373 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
@@ -450,6 +450,7 @@
         if (toHeader) {
             mHeader.attachSystemIcons(systemIcons);
         } else {
+            mHeader.onSystemIconsDetached();
             mStatusBar.reattachSystemIcons();
         }
     }