Update keyguard selector view to match UX design spec

- Use new Roboto-Thin font
- Add new keyguard-specific date format
- Layout tweaks to keyguard selector screen.
- Add smart EmergencyButton class
- Add selective upper-casing of components on the display to enable later UX decision
- Work around SIM state bug

Bug: 7094419
Change-Id: Ic7e0f30697c14d4946372509d98ad81bf6a23c92