Use the public methods for setting rampup/rampdown time

Starting these at 0; default is 500

Change-Id: I1e097bc72d341bdd0ef73c9e9c43a8c37fe76bf9
diff --git a/src/com/android/launcher3/AutoScrollHelper.java b/src/com/android/launcher3/AutoScrollHelper.java
index 3efd807..e41107c 100644
--- a/src/com/android/launcher3/AutoScrollHelper.java
+++ b/src/com/android/launcher3/AutoScrollHelper.java
@@ -67,7 +67,7 @@
  * The following scrolling properties may be configured:
  * <ul>
  * <li>Acceleration ramp-up duration, see {@link #setRampUpDuration}. Default
- * value is 2500 milliseconds.
+ * value is 500 milliseconds.
  * <li>Acceleration ramp-down duration, see {@link #setRampDownDuration}.
  * Default value is 500 milliseconds.
  * <li>Target velocity relative to view size, see {@link #setRelativeVelocity}.
diff --git a/src/com/android/launcher3/FolderAutoScrollHelper.java b/src/com/android/launcher3/FolderAutoScrollHelper.java
index 68edc60..3c2b449 100644
--- a/src/com/android/launcher3/FolderAutoScrollHelper.java
+++ b/src/com/android/launcher3/FolderAutoScrollHelper.java
@@ -36,6 +36,8 @@
         setEdgeType(EDGE_TYPE_INSIDE_EXTEND);
         setExclusive(true);
         setMaximumVelocity(MAX_SCROLL_VELOCITY, MAX_SCROLL_VELOCITY);
+        setRampDownDuration(0);
+        setRampUpDuration(0);
     }
 
     @Override