Fix bug 2242465 - Can add shortcuts while the "3d all apps" is open.

The more I think about it, the more I think AllApps should just be a separate
activity.  It's not a drawer anymore and you open it by pressing a button.
Also, it will want to derive from RenderScriptActivity or something, and
have all that stuff dealt with automatically too.  It's to late to make a
change like this now, but if we do choose to do it someday, I think we'll want
to reconsider the menu that's shown.

For now, just close all apps when they add a shortcut or change the wallpaper.

src/com/android/launcher2/Launcher.java

@@ -1057,6 +1057,7 @@ public final class Launcher extends Activity
     }
 
     private void addItems() {
+        closeAllApps(true);
         showAddDialog(mMenuAddInfo);
     }
 
@@ -1252,6 +1253,7 @@ public final class Launcher extends Activity
     }
 
     private void startWallpaper() {
+        closeAllApps(true);
         final Intent pickWallpaper = new Intent(Intent.ACTION_SET_WALLPAPER);
         Intent chooser = Intent.createChooser(pickWallpaper,
                 getText(R.string.chooser_wallpaper));