Manually upgrade FP3 from Android 10 (dev) to 12 (stable)

[aibd]

@louisdb

Have you used seedvault for backup?

Only experimented, but I have a small saved file, unused. I might regard it as a very small part of my relaxed strategy. Try this

[HOWTO] use Seedvault early to understand Android backup

Integration of Seedvault is an ongoing task and as of 0.18 not yet ready, see the epic Backup app settings (&31) · Epics · e · GitLab to the /e/ teams plans. It is present though on releases since 0.14 maybe. The main advantage of using Seedvault now is quickly reinstalling packages on restore, as all apks are backed up, even if Apps opt-out to userdata backup. Some userdata is restored, see bottom section for limitations. You’ll use the backup- and activity-manager to configure and start on-s…

I felt my experiments with https://www.openandroidbackup.me/ and https://github.com/AndDiSa/android_backup_project/ (needs rooted debugging, so likely will not restore to stable) / were more clear to me where the backup might be relied upon.