Summary:
C#'s factory must inherit from `LayoutFactory` so we can access its
implementation of `FactoryBind`.
Depends on D9759 to avoid test failure on PropertyBound events.
Reviewers: felipealmeida, cedric, SanghyeonLee
Reviewed By: SanghyeonLee
Subscribers: #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D9760