Merge changes from topic "biometric-id"

* changes:
  7/n: BiometricService is the source of truth for sensor strength
  Add biometric tests to presubmit
  6/n: Key by Biometric ID instead of Modality
  5/n: Rename sessionId to operationId
  4/n: AuthContainerView should filter out non-biometric modalities
  3/n: Add IntDefs for several biometric-related constants
  2/n: Move AuthenticatorWrapper its own file
  1/n: Move BiometricService.AuthSession to its own class