Add an debug option to use spacebar switcher

Change-Id: Icc483f097696a1c5a2a7ab037afce19c9cfe837f
diff --git a/java/res/values/strings.xml b/java/res/values/strings.xml
index 66dc7d7..fddc4c6 100644
--- a/java/res/values/strings.xml
+++ b/java/res/values/strings.xml
@@ -55,6 +55,8 @@
     <string name="prefs_suggestion_visibility_show_name">Always show</string>
     <string name="prefs_suggestion_visibility_show_only_portrait_name">Show on portrait mode</string>
     <string name="prefs_suggestion_visibility_hide_name">Always hide</string>
+    <!-- Option to enable spacebar language switcher [CHAR LIMIT=20]-->
+    <string name="prefs_use_spacebar_language_switch">Use the spacebar language switcher</string>
 
     <!-- Option to show/hide the settings key -->
     <string name="prefs_settings_key">Show settings key</string>
diff --git a/java/res/xml/prefs_for_debug.xml b/java/res/xml/prefs_for_debug.xml
index 2dad171..477461d 100644
--- a/java/res/xml/prefs_for_debug.xml
+++ b/java/res/xml/prefs_for_debug.xml
@@ -36,6 +36,13 @@
             />
 
     <CheckBoxPreference
+            android:key="use_spacebar_language_switch"
+            android:title="@string/prefs_use_spacebar_language_switch"
+            android:persistent="true"
+            android:defaultValue="false"
+            />
+
+    <CheckBoxPreference
             android:key="debug_mode"
             android:title="@string/prefs_debug_mode"
             android:persistent="true"