Summary:
kcmshell5 depends on plasma-workspace. By using our own tiny wrapper for opening the KCM we avoid pulling
in plasma-workspace and everything that comes with it on non-Plasma systems.
Test Plan: kdeconnect-settings shows the KCM
Reviewers: #kde_connect, sredman
Reviewed By: #kde_connect, sredman
Subscribers: sredman, kdeconnect
Tags: #kde_connect
Differential Revision: https://phabricator.kde.org/D17383