Adding a utility class to enforce that icons are always flattened on

the background thread.

Bug: 21325319
Change-Id: I4d0f02557cdbf70cfa86750ac047faf2917e39bf

src/com/android/launcher3/model/PackageUpdatedTask.java

@@ -213,7 +213,6 @@ public class PackageUpdatedTask extends ExtendedModelTask {
                                     si.iconResource.resourceName, context);
                             if (icon != null) {
                                 si.setIcon(icon);
-                                si.usingFallbackIcon = false;
                                 infoUpdated = true;
                             }
                         }