Fixed A11y issues

- announce "Fingerprint not recognized" when check enrolled fingerprint
  failed
- announce "Finger name + double tap to rename" when fingerprint item is
  focused

Bug: 406708477
Bug: 406710632
Test: manual: enable talk back and check fingerprint settings
Flag: EXEMPT bug fix
Change-Id: Id2d80c6035883450b4cdc48d850ef4316995f206