Devices with UDPFS shows lock icon on AOD

...when biometrics aren't available due to lockdown/reboot, etc.

Note: on devices with udfps, if the device is unlocked (ie: smart unlock),
then we still show the udfps icon on AOD to prevent from advertising the
device's unlocked state.

Main changes in this CL:
  - use super_lock_icon.xml for both static icons and the transitions
  between the icon states
  - move icon resources to res-keyguard
  - add AOD lock icon resource + transition from AOD <=> lock screen
  - add logic to show a lock icon on AOD (previously would show fp)
Test: manual, atest SystemUITests
Fixes: 194183870
Fixes: 199562477

Change-Id: I7239cc768e3725aa61797f8b0a0fb3d28760962d