Fingerprint user canceled message should not be delayed

The user canceled message is different than the other fingerprint errors
since it is caused by the user explicitly tapping on the UI at which
point the dialog will be already dismissing/dismissed. So the error
should be sent immediately to the application.

Test: manual test with FingerprintDialog, modified to show when the
      error messages are received

Change-Id: Ia2a3b0a7ac9c8cfcbd6055045a95fc06aa02c61a
Fixes: 77337939