This ping will be sent as soon as an update is ready to be applied, after
it's downloaded. This is currently enabled but protected behind the
'toolkit.telemetry.updatePing.enabled' preference.
MozReview-Commit-ID: 4TuM0e5MzBl
It schedules the ping to be sent on new profiles after 30 minutes
from the Firefox startup. The ping is eventually sent at shutdown
if the scheduled time wasn't reached.
To reliably prevent sending the ping more than once, the "session-state.json"
file is used to keep track of the "sent" state.
The "new-profile" ping is protected behind a pref, disabled by default
in this patch.
MozReview-Commit-ID: 4g4lPRXe9q6
