Merge "Update the documentation on createCircularReveal" into nyc-dev

     * As a result {@link AnimatorListener#onAnimationEnd(Animator)}

     * will occur after the animation has ended, but it may be delayed depending

     * on thread responsiveness.

     * <p>

     * Note that if any start delay is set on the reveal animator, the start radius

     * will not be applied to the reveal circle until the start delay has passed.

     * If it's desired to set a start radius on the reveal circle during the start

     * delay, one workaround could be adding an animator with the same start and

     * end radius. For example:

     * <pre><code>

     * public static Animator createRevealWithDelay(View view, int centerX, int centerY, float startRadius, float endRadius) {

     *     Animator delayAnimator = ViewAnimationUtils.createCircularReveal(view, centerX, centerY, startRadius, startRadius);

     *     delayAnimator.setDuration(delayTimeMS);

     *     Animator revealAnimator = ViewAnimationUtils.createCircularReveal(view, centerX, centerY, startRadius, endRadius);

     *     AnimatorSet set = new AnimatorSet();

     *     set.playSequentially(delayAnimator, revealAnimator);

     *     return set;

     * }

     * </code></pre>

     *

     * @param view The View will be clipped to the animating circle.

     * @param centerX The x coordinate of the center of the animating circle, relative to