Re-enable Ultimate parental controls level after kano-settings fix

COPPA: Remove parental setting on update

During the update we were setting the parental restriction in order to
comply with COPPA. This was causing problems with process ownership and
the updater hanging so remove it for this update and resolve the issue
for COPPA go-live date.

Report UI progress in PostUpdate scenario when installing 3rd party apps

This should help with the progress monitor getting a signal during
this long duration phase.

Ensuring old network iface naming scheme with net.ifnames=0

Apt: Retry downloads before failing

Retry downloads after download errors before failing completely.

Tests: Fix version of `pyfakefs` to 3.4.3

Prevent errors caused by new version of `pyfakefs` by utilising the old
version.

Add test for no_monitor behavior.

Add test for no_monitor behavior.

Fix typo

Fix typo