Merge "Prevent null references when updating state" into tm-qpr-dev

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

@@ -225,6 +225,7 @@ public class StatusBarKeyguardViewManager implements RemoteInputController.Callb
     protected CentralSurfaces mCentralSurfaces;
     private NotificationPanelViewController mNotificationPanelViewController;
     private BiometricUnlockController mBiometricUnlockController;
+    private boolean mCentralSurfacesRegistered;
 
     private View mNotificationContainer;
 
@@ -356,6 +357,7 @@ public class StatusBarKeyguardViewManager implements RemoteInputController.Callb
         mNotificationContainer = notificationContainer;
         mKeyguardMessageAreaController = mKeyguardMessageAreaFactory.create(
                 centralSurfaces.getKeyguardMessageArea());
+        mCentralSurfacesRegistered = true;
 
         registerListeners();
     }
@@ -1175,6 +1177,9 @@ public class StatusBarKeyguardViewManager implements RemoteInputController.Callb
     };
 
     protected void updateStates() {
+        if (!mCentralSurfacesRegistered) {
+            return;
+        }
         boolean showing = mKeyguardStateController.isShowing();
         boolean occluded = mKeyguardStateController.isOccluded();
         boolean bouncerShowing = bouncerIsShowing();