Do not exit if setup complete for managed profiles

Previously a call to mark user setup as completed for managed profiles
was removed from the device policy manager service to avoid exiting the
setup wizard while launching it after successfully provisioning.
If a the setup wizard did not finish correctly it had side effects
(e.g. work profile apps would not remain in recent activities).

Allow managed profiles to launch the setup wizard even if user setup
is marked as completed.

Issue: calyxos#1024
Issue: calyxos#1123
Change-Id: I940937dd02f2d4991677da886bb3a4f522661210