Android reports of failure to authorize w/ Opera

## Issue

I've received several reports this week from users who are unable to authorize using this library on Android, and the common thread seems to be that they are on the latest version of Opera. It seems like the underlying OpenId project that this wraps has some reports about this issue as well.

Curious if other people have seen anything like this. So far I've been unable to reproduce it on a simulator, even when disabling Chrome on the device completely.

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## Environment
Android, 8.0 + Opera browser.
Not using Expo.

まず、最新のOperaブラウザーを使用してAndroid 8.0で認証に失敗する問題を調査し、その後、基盤となるOpenIdプロジェクトで報告されている問題と動作を比較します。失敗を再現できるか、または原因を特定でき、検証済みの解決策または文書化された制限事項があれば完了です。

索引モデルが issue の本文から書いたものです。