Adding sort switch in FolderPagedView

> Adding options column in DB to store generation purpose flags
> Storing isSorted flag in FolderInfo
> Adding a switch for A-Z sorting (only visible if pageCount > 1)
> When in sorted mode, spring-load snaps to the target location for 1.5 seconds

Change-Id: I8c7c778d2cc3ccbd35a2890a1a705e1c1a7e9a66
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index 13fd7ee..d161fbb 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -309,5 +309,11 @@
          * <p>Type: INTEGER</p>
          */
         static final String RANK = "rank";
+
+        /**
+         * Stores general flag based options for {@link ItemInfo}s.
+         * <p>Type: INTEGER</p>
+         */
+        static final String OPTIONS = "options";
     }
 }