Use the new logging event for "Notifications on lock screen" in Settings

Bug: 367455695
Change-Id: I7310e625d2415dbad5da25d4c1b02e359f169010
Test: Build
Flag: com.android.server.notification.notification_lock_screen_settings

src/com/android/settings/notification/LockScreenNotificationsPreferencePageFragment.java

@@ -33,8 +33,7 @@ public class LockScreenNotificationsPreferencePageFragment extends DashboardFrag
 
     @Override
     public int getMetricsCategory() {
-        //TODO(b/367455695): create a new metrics category
-        return SettingsEnums.SETTINGS_LOCK_SCREEN_PREFERENCES;
+        return SettingsEnums.SETTINGS_NOTIFICATIONS_ON_LOCK_SCREEN;
     }
 
     @Override