Ğ1kngo: Ask user for mnemonic words on identity confirmation

[vjrj]

@elois

I opened an issue on the Ğ1nkgo repository to explain our concerns about the recovery phrase and suggest how to fix them

Fixed with e2e tests. It will be in the beta Google Play channel in short. It will need a bit or rewording and verification of the sentences in the weblate.

Thanks @elois for the detailed report again.