docs: Add new classes to Wearable UI library

    <li><code>CircledImageView</code> - An image view surrounded by a circle.</li>

    <li><code>ConfirmationActivity</code> - An activity that displays confirmation animations after the user

    completes an action.</li>

    <li><code>CrossFadeDrawable</code> - A drawable that contains two child drawables and provides

    methods to directly adjust the blend between the two.</li>

    <li><code>DelayedConfirmationView</code> - A view that provides a circular countdown timer,

    typically used to automatically confirm an operation after a short delay has elapsed.</li>

    <li><code>DismissOverlayView</code> - A view for implementing long-press-to-dismiss.</li>

    <li><code>DotsPageIndicator</code> - A page indicator for GridViewPager that identifies the

    current page in relation to all available pages on the current row.</li>

    <li><code>GridViewPager</code> - A layout manager that allows the user to both vertically and

    horizontally through pages of data. You supply an implementation of a GridPagerAdapter to

    generate the pages that the view shows.</li>