This change handles as below based on if private space already exists on device:
1. If PS doesn't exist then start the setup flow which shows a PS education screen. On setup button creates the private space.
2. If PS already exists on device then display PS settings page.
Bug: 299069146
Test: atest PrivateSpaceSettingsAuthenticatorTest
Change-Id: I46bdbaeb0210fd5b41a426f852e3f455b62c1c29
This change adds an entry point for Remote Auth enrollment and
navigation through the flow.
Bug: b/293906345
Test: make RunSettingsRoboTests -j40
Change-Id: I9bc803e24c4181ed73a0ef90b171897c677e71d1