Fixing some IconCache methods not  thread safe

Bug: 17981568
Change-Id: I0d49604c2e38bc9017cba527d87e24e8b086f1da
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index 92d7c7d..9cedae0 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -638,7 +638,7 @@
             c.setBitmap(null);
         }
         // Render the icon
-        Drawable icon = mutateOnMainThread(mIconCache.getFullResIcon(info));
+        Drawable icon = mutateOnMainThread(mIconCache.getFullResIcon(info.activityInfo));
 
         int paddingTop = mContext.
                 getResources().getDimensionPixelOffset(R.dimen.shortcut_preview_padding_top);