Adding a rank column for itemInfo

> Rank is used to determine position of an item
in a folder.

Bug: 18590192
Change-Id: I2826a7c570b4cc58e719d685f17a24ec6133804f
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index 65e3d28..13fd7ee 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -295,6 +295,7 @@
          * @see android.provider.LiveFolders#DISPLAY_MODE_GRID
          * @see android.provider.LiveFolders#DISPLAY_MODE_LIST
          */
+        @Deprecated
         static final String DISPLAY_MODE = "displayMode";
 
         /**
@@ -302,5 +303,11 @@
          * <P>Type: INTEGER</P>
          */
         static final String RESTORED = "restored";
+
+        /**
+         * Indicates the position of the item inside an auto-arranged view like folder or hotseat.
+         * <p>Type: INTEGER</p>
+         */
+        static final String RANK = "rank";
     }
 }