Implement spring-loading of folders when dragging over.

Bug: 8912132
Change-Id: Id81889a133e56461df2e20599c4b40020818ba18
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index c57d32e..c87f9e2 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -210,6 +210,7 @@
 
     static final int APPWIDGET_HOST_ID = 1024;
     public static final int EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT = 300;
+    public static final int EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT_FOLDER_CLOSE = 400;
     private static final int ON_ACTIVITY_RESULT_ANIMATION_DELAY = 500;
 
     private static final Object sLock = new Object();