Adds a new activity for Gesture Navigation settings

Bug: 146004827
Test: WIP

Change-Id: Id2732a94e7e1469575aa8204c727379a829bccf8
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 46992ef..50caf32 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -131,6 +131,7 @@
     public static class PhotosStorageActivity extends SettingsActivity {
         /* empty */
     }
+    public static class GestureNavigationSettingsActivity extends SettingsActivity { /* empty */ }
 
     public static class ApnSettingsActivity extends SettingsActivity { /* empty */ }
     public static class WifiCallingSettingsActivity extends SettingsActivity { /* empty */ }