Change the preference name for a theme and remove a preference settings

Change-Id: I5ad980559477775eb44df022e54ce5ef32398601
diff --git a/java/res/xml/prefs.xml b/java/res/xml/prefs.xml
index a3c956e..b4d2d90 100644
--- a/java/res/xml/prefs.xml
+++ b/java/res/xml/prefs.xml
@@ -61,14 +61,14 @@
             android:defaultValue="@string/voice_mode_main"
             />
 
-    <ListPreference
+    <!-- <ListPreference
             android:key="keyboard_layout"
             android:title="@string/keyboard_layout"
             android:persistent="true"
             android:entryValues="@array/keyboard_layout_modes_values"
             android:entries="@array/keyboard_layout_modes"
             android:defaultValue="4"
-            />
+            />-->
 
     <PreferenceScreen
             android:title="@string/language_selection_title"