efl.screen: add screen_scale_factor property
Summary:
ref T7590
Depends on D7966
Reviewers: segfaultxavi
Reviewed By: segfaultxavi
Subscribers: segfaultxavi, cedric, reviewers, committers
Tags: efl: api
Maniphest Tasks: T7590
Differential Revision: https://phab.enlightenment.org/D7967