LineageParts: Add 'Invert layout' to navigation bar settings

* Also remove navigation bar tuner link as AOSP
  killed all its features.

Change-Id: Ic99baeee93c2463a476b7d48b8d6ed4786035b05
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 6ea63bf..8863817 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -249,7 +249,7 @@
 
     <!-- Navigation Bar -->
     <string name="navigation_bar_category">Navigation bar</string>
-    <string name="navigation_bar_title">Buttons and layout</string>
+    <string name="navigation_bar_invert_layout_title">Invert layout</string>
     <string name="navigation_bar_left_summary">Place the navigation bar on the left side of the screen in landscape mode</string>
     <string name="navigation_bar_arrow_keys_title">Show arrow keys while typing</string>
     <string name="navigation_bar_arrow_keys_summary">Display left and right cursor buttons while typing. Overrides IME switcher.</string>
diff --git a/res/xml/button_settings.xml b/res/xml/button_settings.xml
index 0df9650..8a96687 100644
--- a/res/xml/button_settings.xml
+++ b/res/xml/button_settings.xml
@@ -41,11 +41,10 @@
                 android:summary="@string/navigation_bar_arrow_keys_summary"
                 android:defaultValue="false" />
 
-        <PreferenceScreen
-            android:key="navigation_bar"
-            android:title="@string/navigation_bar_title">
-            <intent android:action="com.android.settings.action.NAV_BAR_TUNER" />
-        </PreferenceScreen>
+        <lineageos.preference.SecureSettingSwitchPreference
+                android:key="sysui_nav_bar_inverse"
+                android:title="@string/navigation_bar_invert_layout_title"
+                android:defaultValue="false" />
 
         <ListPreference
             android:key="navigation_home_long_press"