Fix warnings and remove dead code

Change-Id: I574d823fedf4b752c3df5a72599b390f708823ac
diff --git a/src/com/android/launcher2/WallpaperChooserDialogFragment.java b/src/com/android/launcher2/WallpaperChooserDialogFragment.java
index eec699e..b99d8ec 100644
--- a/src/com/android/launcher2/WallpaperChooserDialogFragment.java
+++ b/src/com/android/launcher2/WallpaperChooserDialogFragment.java
@@ -137,7 +137,7 @@
          */
         if (mEmbedded) {
             View view = inflater.inflate(R.layout.wallpaper_chooser, container, false);
-            view.setBackgroundDrawable(mWallpaperDrawable);
+            view.setBackground(mWallpaperDrawable);
 
             final Gallery gallery = (Gallery) view.findViewById(R.id.gallery);
             gallery.setCallbackDuringFling(false);