use ecore_evas_screen_dpi_get when updating e_scale value
use ecore_evas_screen_dpi_get when updating e_scale value

Now that the ecore_evas_drm code can return screen dpi, we can use
that rather than using a client API function (ecore_wl2) to get server
screen dpi.

Signed-off-by: Chris Michael <177aeddb9e34930a357ecd8dd2d21c80fe280c85@samsung.com>

tasn/enlightenment,tasn/enlightenment,tasn/enlightenment