Parts: add navbar inversion

Change-Id: Ifec7b826faba44479664ef83033c1d7a2da4ddca
Signed-off-by: Joey <bevilacquajoey@gmail.com>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index bf1d5ef..aadf40e 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -92,6 +92,10 @@
     <string name="torch_long_press_power_timeout_5min">5 minutes</string>
     <string name="torch_long_press_power_timeout_10min">10 minutes</string>
 
+    <!-- Navigation Bar -->
+    <string name="navigation_bar_category">Navigation bar</string>
+    <string name="navigation_bar_invert_layout_title">Invert navigation bar layout</string>
+
     <!-- Status bar -->
     <string name="status_bar_title">Status bar</string>
     <string name="status_bar_quick_qs_pulldown_title">Quick pulldown</string>