ecore/wayland: Add title_set and class_name_set APIs.

ecore/wayland: Add title_set and class_name_set APIs.

These two APIs will save the title and class_name inside
Ecore_Wl_Window, so if they are called before the shell surface is
created, the stored names will be used later when the window is finally
shown (shell surface is created).

This way we are also hiding the shell surface from ecore_evas modules.