Refactoring FlingToDelete

> Moving all fling related logic to FlingToDeleteHelper from DragController
> Removing fling related methods from DragSource and DropTarget
> Moving fling animation logic from DeleteDropTarget to FlingAnimation
> Simplifying DropTargetBar to directly look for all valid drop targets.
  This makes it easier to add new DropTarget in xml.

Change-Id: I7214d2d30c907ab93c80d92d9f9be6dda2d63354
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index accc3cd..7775a6b 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -3068,7 +3068,7 @@
                 || mState == State.WIDGETS_SPRING_LOADED;
     }
 
-    void exitSpringLoadedDragMode() {
+    public void exitSpringLoadedDragMode() {
         if (mState == State.APPS_SPRING_LOADED) {
             showAppsView(true /* animated */,
                     false /* updatePredictedApps */, false /* focusSearchBar */);