[cli] Show all reachable devices

Summary:
Devices that were reachable but not paired were not shown. This makes it impossible to initiate paring

BUG: 402088

Test Plan:
Have a unpaired device reachable. Without the patch kdeconnect-cli -l does not show it. With the patch it is shown

Reviewers: KDE Connect, albertvaka

Reviewed By: KDE Connect, albertvaka

Subscribers: kdeconnect

Tags: KDE Connect

Differential Revision: https://phabricator.kde.org/D17788