Biometric phenotype updates

1) Always update strength after registerAuthenticator. Otherwise the
   flag will not be applied (e.g. after reboot)
2) Add strings for onAuthenticationError

Bug: 148419762

Test: manual
Test: atest BiometricServiceTest

Change-Id: Ia20a91e401d6753b55d6aa4a36d487fc15465ba5
7 files changed