A QApplication object needs to be instantiated for kio-kdeconnect to work on KDE Neon

Summary:
kio-kdeconnect fails to start on KDE Neon because it does not instantiate a QApplication object

BUG: 400178

Test Plan:
Install on a KDE Neon 5.14 system or VM
Pair an android phone
Browse the phone's filesystem using dolphin

Reviewers: KDE Connect, Frameworks, albertvaka

Reviewed By: KDE Connect, albertvaka

Subscribers: sredman, apol, jriddell, nicolasfella, albertvaka, kdeconnect

Tags: KDE Connect

Differential Revision: https://phabricator.kde.org/D16692