Add kdeconnect-kde to release service

[Nicolas Fella]

Hi,

we would like for KDE Connect to be included in the release service beginning
with the 20.04 release.

As discussed with Jonathan I've moved the metadata to from extragear/network
to kde/kdeutils.

I'm unsure about whether kdeconnect-android should move too or stay in
extragear. I assume the release tooling is not prepared for releases to Google
Play. We usually had separate releases for Android since we cannot align the
rollout anyway.

Cheers

Nico