DisplayCutout: Add clarifying images to LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES

         * The window must make sure that no important content overlaps with the

         * {@link DisplayCutout}.

         *

         * <p>

         * In this mode, the window extends under cutouts on the short edge of the display in both

         * portrait and landscape, regardless of whether the window is hiding the system bars:<br/>

         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/fullscreen_top_no_letterbox.png"

         * height="720"

         * alt="Screenshot of a fullscreen activity on a display with a cutout at the top edge in

         *         portrait, no letterbox is applied."/>

         *

         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/landscape_top_no_letterbox.png"

         * width="720"

         * alt="Screenshot of an activity on a display with a cutout at the top edge in landscape,

         *         no letterbox is applied."/>

         *

         * <p>

         * A cutout in the corner is considered to be on the short edge: <br/>

         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/fullscreen_corner_no_letterbox.png"

         * height="720"

         * alt="Screenshot of a fullscreen activity on a display with a cutout in the corner in

         *         portrait, no letterbox is applied."/>

         *

         * <p>

         * On the other hand, should the cutout be on the long edge of the display, a letterbox will

         * be applied such that the window does not extend into the cutout on either long edge:

         * <br/>

         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/portrait_side_letterbox.png"

         * height="720"

         * alt="Screenshot of an activity on a display with a cutout on the long edge in portrait,

         *         letterbox is applied."/>

         *

         * @see DisplayCutout

         * @see WindowInsets#getDisplayCutout()

         */