Moving LoaderTask static

Will move it to a separate file in a followup cl.
This simplifies dependencies between LauncherModel and LoaderTask which
and making it easier to start the loader before Launcher activity is
created (as the Callbacks in LauncherModel can change while loader is running).

Bug: 34112546
Bug: 37616877
Change-Id: Ie9619c6b0de0e3eb60657c04ae1b58d946c829e9

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

@@ -90,11 +90,21 @@ public class BgDataModel {
      */
     public final Map<ShortcutKey, MutableInt> pinnedShortcutCounts = new HashMap<>();
 
+    /**
+     * True if the launcher has permission to access deep shortcuts.
+     */
+    public boolean hasShortcutHostPermission;
+
     /**
      * Maps all launcher activities to the id's of their shortcuts (if they have any).
      */
     public final MultiHashMap<ComponentKey, String> deepShortcutMap = new MultiHashMap<>();
 
+    /**
+     * Entire list of widgets.
+     */
+    public final WidgetsModel widgetsModel = new WidgetsModel();
+
     /**
      * Clears all the data
      */