When a keepalive is paused, it should sit on its hardware slot for this network to make sure that it is possible to resume later, even if it means other keepalives can't be started at the same time. Test: update AutomaticOnOffKeepaliveTrackerTest for this Fixes: 268149573 Fixes: 283886067 Change-Id: Ida325bdea198d751483a83ee5d9ec26e39812137