[effects/magiclamp] Port to TimeLine

Summary: Depends on D13740

Test Plan: Minimized/Unminimized System Setting window, still works.

Reviewers: KWin, davidedmundson

Reviewed By: KWin, davidedmundson

Subscribers: kwin

Tags: KWin

Differential Revision: https://phabricator.kde.org/D13762