debian: Trigger apt-daily on AC plug event

Alessandro Astonerequested to merge
aleasto/apt:apt-daily-udev into main

Because the service has ConditionACPower=true, it would be nice to try and start it when plugging-in the AC power in case that an earlier timer trigger was missed due to not being plugged-in.

It is not a problem that we may be invoking the service multiple times a day, because it keeps track of its own timestamp file to run up to once every "APT::Periodic::Update-Package-Lists" days

Related: https://launchpad.net/bugs/2089151

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