Close notification panel when user button is tapped

When multi-user is disabled and user button on the notification panel
is tapped, the contact app is displayed behind the notification panel.
The notification panel should be closed
when the contact app is launched.

Bug: 27790403
Change-Id: I66ebcb66c898dfebe1d09b798f750f696c360da8
(cherry picked from commit 8cb009e451)

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

@@ -131,6 +131,9 @@ public class MultiUserSwitch extends FrameLayout implements View.OnClickListener
                     getContext(), v, ContactsContract.Profile.CONTENT_URI,
                     ContactsContract.QuickContact.MODE_LARGE, null);
             getContext().startActivityAsUser(intent, new UserHandle(UserHandle.USER_CURRENT));
+            if (mQsPanel != null) {
+                mQsPanel.getHost().collapsePanels();
+            }
         }
     }