Add confirmation message support for roles.

This change adds confirmation message support for roles, similar to
what we had in default apps. It also added the direct boot unaware
confirmation for dialer and SMS, and refactored dynamic behavior of
roles to implement RoleBehavior.

Bug: 110557011
Bug: 122270890
Test: manual
Change-Id: I71fdb941f59b07274578b687fdf067e34fe89b98