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

core/java/android/widget/EdgeEffect.java

@@ -442,7 +442,6 @@ public class EdgeEffect {
         if (mEdgeEffectType == TYPE_STRETCH) {
             mState = STATE_RECEDE;
             mVelocity = velocity * ON_ABSORB_VELOCITY_ADJUSTMENT;
-            mDistance = 0;
             mStartTime = AnimationUtils.currentAnimationTimeMillis();
         } else {
             mState = STATE_ABSORB;