ChooseLockGeneneric uses intent extra key to determine correct strings
on "Choose screen lock" screen.
Bug: 219419005
Test: atest BiometricEnrollActivityTest
Test: Manully test SUW as following combinations
1. W/ unicorn flow or W/O unicorn flow
2. Fingerprint only devices or Fingerpirnt+Face devices
Change-Id: I2abf9555676f3fb3b92dd6ddcc091ea8158bfe9f