Update listening state when settings changes

Test: builds
Change-Id: I3680e522ef8278c832e455613ceddeb8aec10be5
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
index 32e447b..97160b6 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -372,6 +372,7 @@
         public void onChanged(BiometricSourceType type, boolean enabled) throws RemoteException {
             if (type == BiometricSourceType.FACE) {
                 mFaceSettingEnabledForUser = enabled;
+                updateFaceListeningState();
             }
         }
     };