Fix NPE for devices that don't use a lock icon on the bouncer.

Bug: 130880522
Bug: 131083319
Test: Manual
Change-Id: I630f4df96b64a85d3b45fb95b28ed8e33b38ca1c

packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java

@@ -693,6 +693,9 @@ public class KeyguardIndicationController implements StateListener {
 
         @Override
         public void onKeyguardBouncerChanged(boolean bouncer) {
+            if (mLockIcon == null) {
+                return;
+            }
             mLockIcon.setBouncerVisible(bouncer);
         }
     };