Update physics VelocityTracker units to 175 pixels per second.

This makes it a bit more subtle.

Bug: 38349031
Change-Id: I2a6f5edf2d662ca1e742665e437ff59268f00c07
diff --git a/src/com/android/launcher3/anim/SpringAnimationHandler.java b/src/com/android/launcher3/anim/SpringAnimationHandler.java
index 5792127..488657c 100644
--- a/src/com/android/launcher3/anim/SpringAnimationHandler.java
+++ b/src/com/android/launcher3/anim/SpringAnimationHandler.java
@@ -164,7 +164,7 @@
     }
 
     private void computeVelocity() {
-        getVelocityTracker().computeCurrentVelocity(300);
+        getVelocityTracker().computeCurrentVelocity(175);
 
         mCurrentVelocity = isVerticalDirection()
                 ? getVelocityTracker().getYVelocity()