We decided on calling the state file the "vault" a while back. This patch makes
the naming consistent across the codebase. I left "DatabaseImporter" classes
alone, because I'm not sure what a better name for those would be.
This patch replaces the usage of the deprecated FingerprintManager API with
BiometricPrompt. This uses the Android X library, so we get the native biometric
prompt on recent versions of Android and a Google-made one on older versions. By
not working with custom prompts for biometric authentication like we do now, we
can be sure that any issues like #70, #81, #237 are not actually our fault.
Here's what it looks like:

As a nice aside, this also adds support for the new facial recognition as an
authentication method on Pixel 4 phones.
This is still a draft, but early feedback is welcome.
I think this makes the highlight/reveal functionality feel a bit more
consistent, by not allowing multiple entries to be revealed at the same time,
just like you can't have multiple highlighted entries. Here's video of what it
looks like: https://alexbakker.me/u/3a9dhplrj2.mp4.
This adds an option to highlight tapped entries, so that it's easier to
distinguisch between the one you're trying to enter into a website and the other
ones.
Only one entry can be highlighted at a time. Perhaps it would make sense to
change our tap to reveal functionality to behave the same, so that the two
features are nicely in sync. I can address that in a separate PR if we decide to
do so.
This patch adds support for the new backup file format of andOTP. andOTP has
improved their security by switching from SHA-256 to PBKDF2 to derive the key
for encrypted backups.
Glad to see this has been addressed now. Awesome work, @flocke!
See: andOTP/andOTP@d96b037.
This also fixes an issue with the use of the Iconics library where it was
initialized twice. I also removed the dependency to [AndroidX Preference
eXtended](https://github.com/takisoft/preferencex-android), as there don't seem
to be any issues with using the vanilla AndroidX preference library anymore.
The conversion of the OTP period value to milliseconds may overflow for large
values, causing the result to wrap around to Integer.MIN_VALUE. This
subsequently caused a crash when calling ObjectAnimator.setDuration.