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/FolderIcon.java b/src/com/android/launcher3/FolderIcon.java
index fd83370..c00c9f8 100644
--- a/src/com/android/launcher3/FolderIcon.java
+++ b/src/com/android/launcher3/FolderIcon.java
@@ -429,9 +429,9 @@
 
     public void onDrop(DragObject d) {
         ShortcutInfo item;
-        if (d.dragInfo instanceof ApplicationInfo) {
+        if (d.dragInfo instanceof AppInfo) {
             // Came from all apps -- make a copy
-            item = ((ApplicationInfo) d.dragInfo).makeShortcut();
+            item = ((AppInfo) d.dragInfo).makeShortcut();
         } else {
             item = (ShortcutInfo) d.dragInfo;
         }