[feature] Option to export backup without encryption

[aristeu]

Reasoning/story:

I've always just transferred my tokens using adb in the past and with the new version with ability to backup
and restore I decided it was time to also have an older phone with the same tokens ready just in case I ever
lose my main phone. So I did the migration and entered a password, had it written down then exported the
file and loaded on a much older phone (oneplus one, running LineageOS with Android 11). The restore
didn't work, complained of invalid password. That phone doesn't have Google to use the backup/restore and
fdroid has an older version (24) and the new phone is (40), so I got the 40 apk and installed on the old phone
just in case it was a version issue. It was not.

Actual feature:
Since apparently I managed to type twice a password that is different than the one I wrote down (go figure)
and using adb to backup/restore is not an option anymore, is there a chance to add an option to export the
tokens without encryption (and yes, I'm fully aware of the security risks)? I have a guess that it'd be easier to
implement than allowing to change the password the user picked after a warning you can't change it later.

[atomlab]

The same problem.

[SNMetamorph]

It will be good workaround for issue #283 since it's just in some cases impossible to move 2FA-keys from old phone to new ones.

[johnnynoone]

@justin-stephenson Ability to export to plain text/XML/etc. is important, as it allows users to import data elsewhere. I want to move to another OTP app, but my data is being held hostage.

[SNMetamorph]

@justin-stephenson Ability to export to plain text/XML/etc. is important, as it allows users to import data elsewhere. I want to move to another OTP app, but my data is being held hostage.

Hi, likely you'll not be able to export your keys without encryption from it. So that's the point to think, maybe it's worth to re-create all 2FA keys? FreeOTP+ fork can import/export keys to regular JSON file, I was using it since this year spring and have a hassle-free experience

[johnnynoone]

Can FreeOTP+ import encrypted backups from FreeOTP? If not, it's not useful to me. I want to move to Aegis.