Support colorScheme <case/> condition in Keyboard XML

Change-Id: Ibbfb99e0e2b15df301f83af6739b7bca01ebf490
diff --git a/java/res/values/styles.xml b/java/res/values/styles.xml
index d2acafd..6ab4ded 100644
--- a/java/res/values/styles.xml
+++ b/java/res/values/styles.xml
@@ -31,7 +31,7 @@
         <item name="shadowColor">#BB000000</item>
         <item name="shadowRadius">2.75</item>
         <item name="backgroundDimAmount">0.5</item>
-        <item name="symbolColorScheme">white</item>
+        <item name="colorScheme">white</item>
     </style>
     <style name="KeyPreviewAnimation">
         <item name="android:windowEnterAnimation">@anim/key_preview_fadein</item>