e_desk_group: Add API for resizing method of window in desk_group

e_desk_group: Add API for resizing method of window in desk_group

Add API for choose resizing method of window in desk group.

when the e_desk_group_transform_enable_set receives True value,
the window in desk group will be transformed to fit to geometry of desk group same as before.
when disabled, then the window will be resized their client size to fit to geometry of desk group.

NOTE: current maximize size of the window is fit to desk.
e_client_maximized_geometry_set should be called after transform disable to set maximize size as geometry of desk_group.

Change-Id: I4175fe01cb1a4cca6dca5a296a8c27ad3a606ec1