Private space auto lock on device restart during setup

After creation of private space value of auto-lock setting is explicitly
set to lock on device restarts. Just before the end of the setup flow
the auto-lock setting is changed to auto-lock on device lock before the
last screen of private space setup.

Bug: 342398315
Test: atest PrivateSpaceMaintainerTest
Change-Id: I8eeb0058c7ecb31d6e30b4cc78ec5877ed316f75