add more Animation APIs and call onAnimationEnd()

Directly calling onAnimationEnd() skips the animation and directly sets
the target values

src/api-impl/android/view/animation/AnimationUtils.java

@@ -4,4 +4,8 @@ import android.content.Context;
 
 public class AnimationUtils {
 	public static Animation loadAnimation(Context context, int dummy) { return new Animation(); }
+
+	public static long currentAnimationTimeMillis() {
+		return System.currentTimeMillis();
+	}
 }