Proof of concept of a wayland protocol to allow the keystate dataengine to work
Test Plan: Tested with both the lock screen and the keyboard indicator plasmoid
Reviewers: KWin, davidedmundson
Reviewed By: KWin, davidedmundson
Subscribers: davidedmundson, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D20191