Always attempt automatic backup creation

- Defaults to every 12 hours
- Minimum number of backups is now 2, just to offer some level of redundancy in case something happens
- If it's missing storage permissions, it'll fail but that's the user's loss if they somehow haven't granted that permission yet

# Conflicts:
#	app/build.gradle.kts
#	app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupManager.kt

app/src/main/java/exh/EXHMigrations.kt

@@ -448,6 +448,15 @@ object EXHMigrations {
                         remove("library_sorting_ascending")
                     }
                 }
+                if (oldVersion under 40) {
+                    if (preferences.numberOfBackups().get() == 1) {
+                        preferences.numberOfBackups().set(2)
+                    }
+                    if (preferences.backupInterval().get() == 0) {
+                        preferences.backupInterval().set(12)
+                        BackupCreatorJob.setupTask(context)
+                    }
+                }
 
                 // if (oldVersion under 1) { } (1 is current release version)
                 // do stuff here when releasing changed crap