Fix forgotten resource name change

Change-Id: I27ea28c7ea93e50ea8f0d947df95e3ab6d146f11
diff --git a/java/res/values-sw768dp/config.xml b/java/res/values-sw768dp/config.xml
index d46e5f1..b78a6c6 100644
--- a/java/res/values-sw768dp/config.xml
+++ b/java/res/values-sw768dp/config.xml
@@ -29,7 +29,7 @@
     <!-- Long pressing space will invoke IME switcher if > 0, never invoke IME switcher if == 0 -->
     <integer name="config_long_press_space_key_timeout">0</integer>
     <!-- This configuration is the index of the array {@link KeyboardSwitcher.KEYBOARD_THEMES}. -->
-    <string name="config_default_keyboard_theme_id" translatable="false">5</string>
+    <string name="config_default_keyboard_theme_index" translatable="false">5</string>
     <integer name="config_max_more_keys_column">5</integer>
     <!--
         Configuration for LatinKeyboardView