Move wallpapers to external activity

Also renaming Launcher's ApplicationInfo to
AppInfo since ApplicationInfo is already a 
framework class

Change-Id: Ib3e91d2ba4ace458d790a26c0ce850870fd3f146
diff --git a/src/com/android/launcher3/IconCache.java b/src/com/android/launcher3/IconCache.java
index 6fc40e3..1797826 100644
--- a/src/com/android/launcher3/IconCache.java
+++ b/src/com/android/launcher3/IconCache.java
@@ -149,7 +149,7 @@
     /**
      * Fill in "application" with the icon and label for "info."
      */
-    public void getTitleAndIcon(ApplicationInfo application, ResolveInfo info,
+    public void getTitleAndIcon(AppInfo application, ResolveInfo info,
             HashMap<Object, CharSequence> labelCache) {
         synchronized (mCache) {
             CacheEntry entry = cacheLocked(application.componentName, info, labelCache);