Support v7 MenuPopupHelper is now hidden and restricted to LIBRARY_GROUP : <p>Recently i've been getting a lint error on my usage of <code>android.support.v7.view.menu.MenuPopupHelper</code> which is now hidden and restricted to be only used within its library group.</p>

<p><strong>Exact message:</strong></p>

<p><code>MenuPopupHelper constructor can only be called from within the same library group (groupId=com.android.support)</code></p>

<p><strong>Excerpt from the <code>MenuPopupHelper.java</code> class:</strong></p>

<pre><code>/**
 * Presents a menu as a small, simple popup anchored to another view.
 *
 * @hide
 */
@RestrictTo(LIBRARY_GROUP)
public class MenuPopupHelper implements MenuHelper {
</code></pre>

<p><strong>Question:</strong>
Any idea when and why this happened ? or whats the workaround that I should look for ?</p>
