ecore_x has ecore_x_icccm_window_role_set API.
- To decide to add ecore_wl_window_role_set
(we already discussed to add this)
- check this feature alredy in wayland2?
does it need to open api in ecore level or elm win?
Usecase: backward compatability.
If the task was alredy implemented, we will close this task.(To check that the task is alredy implement can be task)