AVD: Deep copy the animator target setup when mutate.

Only calling VectorDrawable's mutate here will miss all the animator setup,
when the VectorDrawable has a new state.
So we just deep copy everything and setup the animators again.

b/18521582

Change-Id: Id164312750bb548f9c2d21cc0b5806cd2bafcf0d
diff --git a/graphics/java/android/graphics/drawable/AnimatedVectorDrawable.java b/graphics/java/android/graphics/drawable/AnimatedVectorDrawable.java
index e9c8c2a..2a17a60 100644
--- a/graphics/java/android/graphics/drawable/AnimatedVectorDrawable.java
+++ b/graphics/java/android/graphics/drawable/AnimatedVectorDrawable.java
@@ -146,7 +146,8 @@
     @Override
     public Drawable mutate() {
         if (!mMutated && super.mutate() == this) {
-            mAnimatedVectorState.mVectorDrawable.mutate();
+            mAnimatedVectorState = new AnimatedVectorDrawableState(
+                    mAnimatedVectorState, mCallback, null);
             mMutated = true;
         }
         return this;