Revert "Refactor KeyboardTheme"

This reverts commit 19688b584bb903192559196a0e3836bc4c957696.

Build breakage.

Change-Id: I95d4be1578824eaee5a2fb08ec277250727ac668
diff --git a/java/res/xml/prefs.xml b/java/res/xml/prefs.xml
index 61ebb69..7d86dbd 100644
--- a/java/res/xml/prefs.xml
+++ b/java/res/xml/prefs.xml
@@ -158,11 +158,12 @@
                 android:persistent="true"
                 android:defaultValue="false" />
             <ListPreference
-                android:key="pref_keyboard_theme"
+                android:key="pref_keyboard_layout_20110916"
                 android:title="@string/keyboard_color_scheme"
                 android:persistent="true"
                 android:entryValues="@array/keyboard_theme_ids"
-                android:entries="@array/keyboard_theme_names" />
+                android:entries="@array/keyboard_theme_names"
+                android:defaultValue="@string/config_default_keyboard_theme_id" />
             <PreferenceScreen
                 android:fragment="com.android.inputmethod.latin.settings.AdditionalSubtypeSettings"
                 android:key="custom_input_styles"