Offer TOTP Autofill for OTP fields

[fmeum]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates

📜 Description

Make (modern) Autofill detect OTP fields and offer to fill them with TOTPs calculated from a secret stored in the encrypted extras.

OTP fields are currently detected based on the W3C hint one-time-code, a maxLength between 6 and 8 and/or the strings "otp" and "code" in attributes. For now, we don't allow filling both OTPs and passwords/usernames at the same time since I have never seen a site do this.

💡 Motivation and Context

TOTPs are here to stay and we should do our best to protect them from phishing. It also turns out that our Autofill implementation is flexible enough that adding support for this requires only ~100 changed lines.
Fixes #663.

💚 How did you test it?

I verified that this works with Amazon in Chrome and that existing workflows are not obviously broken. Since I rarely use OTPs, I would like to let the snapshot users test this more thoroughly and focus on fixing the issues they find.

📝 Checklist

• I formatted the code with the IDE's reformat action (Ctrl + Shift + L/Cmd + Shift + L)
• I reviewed submitted code
• I added a CHANGELOG entry if applicable

🔮 Next steps

I will look into providing autofilled OTPs from SMS.

📸 Screenshots / GIFs

[msfjarvis]

LGTM

[fmeum]

This triggered the Build debug workflow, which then failed on the Telegram step.

[msfjarvis]

This triggered the Build debug workflow, which then failed on the Telegram step.

But the workflow is gone from both release and develop branches, so how? I don't see it in my 'Checks' list either.

[fmeum]

This triggered the Build debug workflow, which then failed on the Telegram step.

But the workflow is gone from both release and develop branches, so how? I don't see it in my 'Checks' list either.

No idea, I just saw it pop up here: https://github.com/android-password-store/Android-Password-Store/actions/runs/151222874
Let's just wait for it to show up again before we investigate this further.

[fmeum]

This triggered the Build debug workflow, which then failed on the Telegram step.

But the workflow is gone from both release and develop branches, so how? I don't see it in my 'Checks' list either.

No idea, I just saw it pop up here: https://github.com/android-password-store/Android-Password-Store/actions/runs/151222874
Let's just wait for it to show up again before we investigate this further.

Might have been an older branch that I pushed, I just saw that feature/otp_autofill (not feature/autofill_otp) might not have been up-to-date with develop.