Integrity check for sha256: missing value is considered a problem (#5920)
Integrity check for sha256: missing value is considered a problem (#5920)

* Integrity check for sha256: missing value is considered a problem

* Update app/lib/shared/integrity.dart

Co-authored-by: Sigurd Meldgaard <3f12f2c0f1efe4fd67753fcd55cd7bc21e5b85cf@google.com>

Co-authored-by: Sigurd Meldgaard <3f12f2c0f1efe4fd67753fcd55cd7bc21e5b85cf@google.com>
dart-lang/pub-dev,dart-lang/pub-dev,dart-lang/pub-dev,dart-lang/pub-dev