tree 386a4091b4b461be63708ce5ec117ff56c7478d0
parent 87f257a9e591b96dc64c7b2b8f3004800e6fc115
author Kevin Chyn <kchyn@google.com> 1543451556 -0800
committer Kevin Chyn <kchyn@google.com> 1543606475 -0800

3/n: For passive modalities, add plumbing for "try again"

When "try again" is showing, authentication is canceled internally.
BiometricService caches the client's info so that authentication can
be restarted when "try again" is pressed. Because authentication
is not running when "try again" is showing, BiometricService also needs
to have a TaskStackListener so that BP can be dismissed and an error can
be sent to the client when the app loses focus.

IBiometricServiceReceiver has been split into two. One for BiometricPrompt
to receive messages from BiometricService, and another for BiometricService
to receive messages from SystemUI/<Biometric>Services.

When we get locked out, don't send the last onAuthenticationFailed
to the client, since "Authentication failed" will be shown briefly
and be replaced by "Device locked out" which is janky

Bug: 111461540

Test: Tested with requireConfirmation enabled/disabled
Test: Tested onConfigurationChange corner cases, e.g. when "try again"
      or "confirm" buttons are showing, rotate the device. Buttons
      persist correctly and don't appear when unexpected
Test: Tested task stack corner cases, e.g. when "try again" is showing,
      press home button. BP dismisses and client receives ERROR_CANCELED
Test: BiometricPromptDemo receives all callbacks

Change-Id: I62126708ce8db8b358c666a07aa7c39607642c9d