Revert "Revert "fix: unify encryption across platforms""

[OmarHatem28]

Reverts #3634

[github-actions]

changes in dependencies

changed git refs:
  cake_backup
    url   https://github.com/cake-tech/cake_backup.git -> https://github.com/cake-tech/cake_backup.git
    ref   3aba867dcab6737f6707782f5db15d71f303db38 -> b5d86a2a21e1c186cd0baa4df1f3a4f3f9413056
    path  - -> -
     lib/backup.dart       | 90 ++++++++++++++++++++++++++++++++++++++-------------
     test/backup_test.dart | 50 +++++++++++++++++++++++++---
     2 files changed, 114 insertions(+), 26 deletions(-)