Fix missing typed_data import

[rfuerst87]

Fixes #649 and probably also #653.

[rfuerst87]

No idea why Ble Workflow is failing. Quality checks run just fine on my machine. Unfortunately I do not have access to codemagic logs. Could the checked in pubspec.lock files cause problems? See #652 and #655.

[rfuerst87]

Ok, turns out flutter 3.3.0 explicitly exports Uint8List from dart:typed_data in package:flutter/foundation.dart. I'm not really sure whether the compatibility break was intentional or not. As you removed the imports I did set minimum requirements for flutter to 3.3.0. See this PR from flutter: flutter/flutter#105648

Another option would be to add the imports again and advise the linter to ignore unnecessary imports using // ignore: unnecessary_import. Anyway, at some point you probably want to get rid of the imports.

Let me know what you prefer. I'll update the PR accordingly.