Fix typo in JavaDoc for TypeEvaluator.

Change-Id: Ice2b2db117e1f91ad70ed55d4cc0b14b86804c1c

core/java/android/animation/TypeEvaluator.java

@@ -19,7 +19,7 @@ package android.animation;
 /**
  * Interface for use with the {@link ValueAnimator#setEvaluator(TypeEvaluator)} function. Evaluators
  * allow developers to create animations on arbitrary property types, by allowing them to supply
- * custom evaulators for types that are not automatically understood and used by the animation
+ * custom evaluators for types that are not automatically understood and used by the animation
  * system.
  *
  * @see ValueAnimator#setEvaluator(TypeEvaluator)
@@ -41,4 +41,4 @@ public interface TypeEvaluator<T> {
      */
     public T evaluate(float fraction, T startValue, T endValue);
 
-}
+}