Fix issue #2271640: Fix wallpaper etc docs

Track API changes.
diff --git a/res/xml/magicsmoke.xml b/res/xml/magicsmoke.xml
index fed502a..f1f5cd2 100644
--- a/res/xml/magicsmoke.xml
+++ b/res/xml/magicsmoke.xml
@@ -21,8 +21,8 @@
 <!-- for the cube. -->
 
 <wallpaper xmlns:android="http://schemas.android.com/apk/res/android"
-    android:wallpaperAuthor="@string/author"
-    android:wallpaperDescription="@string/magicsmoke_desc"
+    android:author="@string/author"
+    android:description="@string/magicsmoke_desc"
     android:thumbnail="@drawable/magicsmoke_thumb"
     android:settingsActivity="com.android.magicsmoke.MagicSmokeSelector"
 />