Add missing delegate for AnimatorInflater.

Change-Id: I96ef2b1085dadfae280df6740aebc10f57e3b949

tools/layoutlib/bridge/src/android/animation/AnimatorInflater_Delegate.java

@@ -22,6 +22,7 @@ import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.Resources.NotFoundException;
 import android.content.res.Resources.Theme;
+import android.util.AttributeSet;
 
 /**
  * Delegate providing alternate implementation to static methods in {@link AnimatorInflater}.
@@ -48,4 +49,11 @@ public class AnimatorInflater_Delegate {
         // TODO: Remove this override when Path.approximate() is supported.
         return new FakeAnimator();
     }
+
+    @LayoutlibDelegate
+    /*package*/ static ValueAnimator loadAnimator(Resources res, Theme theme,
+            AttributeSet attrs, ValueAnimator anim, float pathErrorScale)
+            throws NotFoundException {
+        return anim;
+    }
 }