Fix automatic data reset on for users affected by encryption issues...

Fix automatic data reset on for users affected by encryption issues (EXPOSUREAPP-3313, EXPOSUREAPP-3335) (#1433)

* I overlooked that `KeyException` is a subclass of `GeneralSecurityException`.
This causes us to continue with `KeyException` which then fails the message matching test.
As the underlying Tink code throws the GeneralSecurityException first, we check the type of the last exception.

* Add additional specific test cases for nested exceptions.

* The dialog shouldn't automatically dismiss when the user clicks details.
They may not have read the dialog message completely or want to re-read it.