When testing out WebAuthn support with the privileged API,
we need our app to be signed by an allowed signing key.

We're seeing our tests fail with this error when testing locally:

```
  [FidoApiImpl] updateTransaction is called for stop
  [FidoApiImpl] finishSecurityKeyRequestController should not be called when SecurityKeyRequestController is null.
```

Our theory is that if we try this code on our signed APK, we should see
it work.