Introduce delay (60s) and interval (24h) for system / driver updates checks

[vjr]

What Happened?

The delayed-check-for-updates-fix (wait 60 secs upon login and only update 24 hours after the previous one) appears to have regressed - I guess because/when the system updates have moved from appcenter to system-settings? (the "about" plug)

edit: I later realised it's likely the settings-daemon repo

I notice this because when I bootup and login to my os8 install(s) the first immediate thing I do is open terminal and run apt update / apt full-upgrade then flatpak update and the apt run shows a lock being held (by packagekit?) which I believe is the system-settings checking for updates?

Can we add the same delay (60s) and interval (24h) to the system-settings update check too?

I see a couple of resolved issues which is why I consider this to be an issue (regression) and not a feature request:

elementary/appcenter#721
elementary/appcenter#495

Steps to Reproduce

1. Bootup OS8 and login.
2. Immediately open terminal and run apt update / full-upgrade
3. Observe (error) message about apt/dpkg lock being held (by packagekit?).
4. Wait few moments then retry step 2 and see it works fine now.

Expected Behavior

System updates checks/installs should wait 60s before launching after first boot and login and run at 24h intervals like how it used to be in AppCenter before moving to this system settings component.

OS Version

8.x (Early Access)

Software Version

Latest release (I have run all updates)

Log Output

No response

Hardware Info

No response

[vjr]

Oh the issue may be in Settings Daemon? (the state_changed signal)...

edit: For both the System Updates and Drivers backends being used by the System Settings plug.