1/2 Making bouncer shift on double tap when user chooser is visible

This change makes bouncer/security swap sides with multi user view without proper animation. Adding animation will come in follow up CL.
The main change is extracting double tap and shift logic to SidedSecurityMode superclass so both "one handed mode" and "multi user mode" can inherit from it and behave in a similar way.

Bug: 220872694
Test: KeyguardSecurityContainerTest
Test: open bouncer with user chooser on the side, double tap on the other side of the bouncer, see views swap positions
Change-Id: Ic7e32412edd4c25dde709db0544e60ec9ab951e5