Restore long press power setting back to gestures

The settings menu content will be reworked to be consistent with other gesture entries.

Bug: 191899039
Test: manual
Change-Id: Ia98fed5d9f04a66e22dae747e63e7d1a0bc37fa3
diff --git a/res/xml/gestures.xml b/res/xml/gestures.xml
index 6de9c1a..175a826 100644
--- a/res/xml/gestures.xml
+++ b/res/xml/gestures.xml
@@ -86,4 +86,10 @@
         android:title="@string/gesture_prevent_ringing_screen_title"
         android:fragment="com.android.settings.gestures.PreventRingingGestureSettings"
         settings:controller="com.android.settings.gestures.PreventRingingParentPreferenceController" />
+
+    <Preference
+        android:key="gesture_power_menu_summary"
+        android:title="@string/power_menu_setting_name"
+        android:fragment="com.android.settings.gestures.PowerMenuSettings"
+        settings:controller="com.android.settings.gestures.PowerMenuPreferenceController" />
 </PreferenceScreen>