Fix keyboard theme parsing

This is a followup of I13b9997e.

Change-Id: I4c10fbc8b250c3bad72e38d46089684a839bdd5f
diff --git a/java/res/values/themes-stone-bold.xml b/java/res/values/themes-stone-bold.xml
index fdf9c51..532a298 100644
--- a/java/res/values/themes-stone-bold.xml
+++ b/java/res/values/themes-stone-bold.xml
@@ -16,7 +16,7 @@
 
 <resources>
     <style name="KeyboardTheme.Stone.Bold" parent="KeyboardIcons.Black">
-        <item name="keyboardStyle">@style/Keyboard.Stone</item>
+        <item name="keyboardStyle">@style/Keyboard.Stone.Bold</item>
         <item name="latinKeyboardStyle">@style/LatinKeyboard.Stone</item>
         <item name="keyboardViewStyle">@style/KeyboardView.Stone.Bold</item>
         <item name="miniKeyboardStyle">@style/MiniKeyboard.Stone</item>