[1/2] OmniGears: move theme switch into styles

Change-Id: Ic8061b45bcb40111874ffec8b7922831524b6509
diff --git a/res/values/custom_strings.xml b/res/values/custom_strings.xml
index b3e8742..7dfb371 100644
--- a/res/values/custom_strings.xml
+++ b/res/values/custom_strings.xml
@@ -423,4 +423,9 @@
 
     <string name="lockscreen_hide_media_title">Disable media wallpaper</string>
     <string name="lockscreen_hide_media_summary">Do not show media metadata as lock screen wallpaper</string>
+
+    <string name="night_mode_title">Theme</string>
+    <string name="night_mode_summary">%s</string>
+    <string name="night_mode_no">Light</string>
+    <string name="night_mode_yes">Dark</string>
 </resources>