SettingsProvider: move SYSTEM_PROFILES_ENABLED to CMSettings

When upgrading from 12.1 -> 13.0, we end up losing this setting because
we forward all calls for that setting directly to the CMSettings table,
which would not have a default set.

Most of the code assumes profiles are on by default. So if the user had
profiles disabled (and potentially in a state they were unaware of), the
upgrade could cause some pains as it would ignore their old setting.

Ticket: OPO-620

Change-Id: I2b645dc9422fe15daf62d89e77b3e1429c668c04
Signed-off-by: Roman Birg <roman@cyngn.com>