Show logout button on keyguard

- Introduced logout button with desnse button style that switch to user 0 and stop the user
- Use owner_info to calculate KeyguardStatusView bottom if that exist, or keyguard_clock_container otherwise, to prevent notification overlapping owenr_info or the clock.

Test: Logout button does not appear in user 0
Test: Logout button does not appear on unmanaged device
Test: Logout button does not appear when isLogoutEnabled is false
Test: Logout button is shown on secondary users when isLogoutEnabled is true, clicking on logout button switch to user 0 and stops the user
Bug: 71786325

Change-Id: I5adfabd3ea4cc2ed78e7bdd31cbb25f2cea4cce2