Storage permission can't be granted for imports

[Terrance]

As part of trying to import some hand-crafted WhatsApp backups (#49), I'm testing against a second device (Android 13) with a new installation of Signal. When I try to import a WhatsApp backup, I get the following:

Signal needs the Storage permission in order to read from external storage, but it has been permanently denied. Please continue to app settings, select "Permissions", then enable "Storage".

This opens the app info screen, but the permissions list from there does not include Storage as an option. The separate "all files access" permission was prompted for and allowed on its own screen the first time around, but this doesn't seem to be sufficient.

I have the same problem with a dual installation in the work profile of my main device (also Android 13).