Remove the divider above footer in Gesture Navigation Settings

Fixes: 180568503
Test: manual
Change-Id: I3cadc106fa0b41a1b98d083d6a2ada5640a4295c
diff --git a/res/xml/gesture_navigation_settings.xml b/res/xml/gesture_navigation_settings.xml
index b509542..0515d78 100644
--- a/res/xml/gesture_navigation_settings.xml
+++ b/res/xml/gesture_navigation_settings.xml
@@ -49,7 +49,6 @@
         android:key="gesture_navigation_settings_footer"
         android:title="@string/back_sensitivity_dialog_message"
         android:selectable="false"
-        settings:searchable="false"
-        settings:allowDividerAbove="true"/>
+        settings:searchable="false"/>
 </PreferenceScreen>