Expose Lock screen settings page.

Test: atest
Bug: 188105349
Change-Id: I7646f712608076037634c26d2334de4367b4452b
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 8ae93ea..8f06c1f 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -120,6 +120,10 @@
     public static class AccessibilityContrastSettingsActivity extends SettingsActivity { /* empty */ }
     public static class AccessibilityDaltonizerSettingsActivity extends SettingsActivity { /* empty */ }
     /**
+     * Activity for lockscreen settings.
+     */
+    public static class LockScreenSettingsActivity extends SettingsActivity { /* empty */ }
+    /**
      * Activity for Reduce Bright Colors.
      */
     public static class ReduceBrightColorsSettingsActivity extends SettingsActivity { /* empty */ }