end() a reverse()'d animation correctly

Previously, an animator that had been reverse()'d (and was thus
playing backwards) would not end() at the right value. That is, a call
to end() would cause the animation to snap to its original end value, not
the reverse-playing end value (i.e., its start value). Logic to handle
calculating the proper end value was not taking the reversing behavior
into account.

Issue #6583656 When you call end() after calling reverse() on an animation that has not started leads to forward animation finishing.

Change-Id: Ifca60a32d4973c21b85aed9c459f802526c0207e

Author: chethaase

core/java/android/animation/ValueAnimator.java

@@ -958,13 +958,7 @@ public void end() {
         } else if (!mInitialized) {
             initAnimation();
         }
-        // The final value set on the target varies, depending on whether the animation
-        // was supposed to repeat an odd number of times
-        if (mRepeatCount > 0 && (mRepeatCount & 0x01) == 1) {
-            animateValue(0f);
-        } else {
-            animateValue(1f);
-        }
+        animateValue(mPlayingBackwards ? 0f : 1f);
         endAnimation(handler);
     }