Cleaning up LauncherModel

- performing all DB operations immediately if called from worker thread (a previous change that did this in updateItemInDatabase fixed an outstanding bug)
- centralizing logic to do database updates
- removing old logging code

Change-Id: Idc7bfef3921828ff7c5492b8e996c0a07e1ec508
diff --git a/src/com/android/launcher2/PendingAddItemInfo.java b/src/com/android/launcher2/PendingAddItemInfo.java
index 6ee300b..7b564e0 100644
--- a/src/com/android/launcher2/PendingAddItemInfo.java
+++ b/src/com/android/launcher2/PendingAddItemInfo.java
@@ -28,10 +28,6 @@
      * The component that will be created.
      */
     ComponentName componentName;
-
-    public PendingAddItemInfo(String whereCreated) {
-        super(whereCreated);
-    }
 }
 
 class PendingAddWidgetInfo extends PendingAddItemInfo {
@@ -43,9 +39,7 @@
     String mimeType;
     Parcelable configurationData;
 
-    public PendingAddWidgetInfo(
-            AppWidgetProviderInfo i, String dataMimeType, Parcelable data, String whereCreated) {
-        super(whereCreated);
+    public PendingAddWidgetInfo(AppWidgetProviderInfo i, String dataMimeType, Parcelable data) {
         itemType = LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET;
         componentName = i.provider;
         minWidth = i.minWidth;