This class can be used to enable the use of HierarchyViewer inside an
 * application. HierarchyViewer is an Android SDK tool that can be used to
 * inspect and debug the user interface of running applications. For security
 * reasons, HierarchyViewer does not work on production builds (for instance
 * phones bought in store.) By using this class, you can make HierarchyViewer
 * work on any device. You must be very careful however to only enable
 * HierarchyViewer when debugging your application.