Allow EdgeEffect to fling during pull

Bug: 186430321

EdgeEffect was restarting the fling from the start if onAbsorb()
was called after onPullDistance(). This CL does not reset
the distance in onAbsorb().

Test: new test
Change-Id: I0657059c275f42cfe229a3aaa8bf37c87e0394f1
1 file changed