Fix clone() for Animators with just a 'to' value

Previously, clone() on an Animator with only one value would mistakenly
think that the clone had a real starting value (which would end up being 0 in the
int and float cases). Fix is to set the 'mHasFirstValue' flag appropriately for the
clone, based on the state of the cloned animator.

Issue #7106442 ObjectAnimator.clone() does not work properly for single parameter

Change-Id: I08bf03b7687a65eb613c1671a58e4cbfae66a30e

Author: chethaase

core/java/android/animation/Keyframe.java

@@ -261,7 +261,7 @@ public void setValue(Object value) {
 
         @Override
         public ObjectKeyframe clone() {
-            ObjectKeyframe kfClone = new ObjectKeyframe(getFraction(), mValue);
+            ObjectKeyframe kfClone = new ObjectKeyframe(getFraction(), mHasValue ? mValue : null);
             kfClone.setInterpolator(getInterpolator());
             return kfClone;
         }
@@ -306,7 +306,9 @@ public void setValue(Object value) {
 
         @Override
         public IntKeyframe clone() {
-            IntKeyframe kfClone = new IntKeyframe(getFraction(), mValue);
+            IntKeyframe kfClone = mHasValue ?
+                    new IntKeyframe(getFraction(), mValue) :
+                    new IntKeyframe(getFraction());
             kfClone.setInterpolator(getInterpolator());
             return kfClone;
         }
@@ -350,7 +352,9 @@ public void setValue(Object value) {
 
         @Override
         public FloatKeyframe clone() {
-            FloatKeyframe kfClone = new FloatKeyframe(getFraction(), mValue);
+            FloatKeyframe kfClone = mHasValue ?
+                    new FloatKeyframe(getFraction(), mValue) :
+                    new FloatKeyframe(getFraction());
             kfClone.setInterpolator(getInterpolator());
             return kfClone;
         }