Can't login through provider from DialogFragment

### Describe your environment
Android Studio version: 4.1 RC 1
Firebase Component: Firebase Authentication
Component version: 19.3.2

### Describe the problem
Hello. I have the problem.
When i try to sign in by _startActivityForSignInWithProvider()_ method :

```kotlin
val provider = OAuthProvider.newBuilder("twitter.com").build()
Firebase.auth
.startActivityForSignInWithProvider(this, provider)
.addOnSuccessListener {
onSignInSuccess()
saveAuthorizationData(it.toRealmAuthorization())
}
.addOnFailureListener { onSignInError(it) }
```
from Activity/Fragmen - It's all right. I can log in with my Twitter provider.
**But (!) when i try to sign in from DialogFragment, which nested into parent fragment, application is stops working. There is no information in logs.**

That's what's going on:
The android application first redirects me to the browser. In browser I sign in into Twitter account, then it starts redirecting me to the application again. I see progress bar, than dimmed desktop screen. Since that moment nothing happens.
Please help, because it makes no sense to call an authorization request outside the dialog.