ecore_wl2_window: check current geometry in window_sync_geometry_set function

ecore_wl2_window: check current geometry in window_sync_geometry_set function

There was a bug that the pending.user_resize value was not unset if the new geometry was same
to current geometry in ecore_wl2_window_sync_geometry_set().
This was becuase that the display server didn't send the configure event if the window geometry
was not changed.

So, we changed code that the ecore_wl2_window_sync_geometry_set() function just returns if
the new geometry is same to previous geometry.

@tizen_only

Change-Id: Idff1ba819f45a83cfdd6ff5dbab03d51334379bf