chore: use time format based on system settings

[dawidd6]

Closes: #1289

Please make sure that your Pull Request meet the following acceptance criteria:

• Code formatting and import sorting has been done with dart format lib/ test/ and dart run import_sorter:main --no-comments
• The commit message uses the format of Conventional Commits
• The commit message describes what has been changed, why it has been changed and how it has been changed
• Every new feature or change of the design/GUI is linked to an approved design proposal in an issue
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Pull Request has been tested on:

• Android
• iOS
• Browser (Chromium based)
• Browser (Firefox based)
• Browser (WebKit based)
• Desktop Linux
• Desktop Windows
• Desktop macOS

[JAicewizard]

Looking at the documentation (https://api.flutter.dev/flutter/widgets/MediaQueryData/alwaysUse24HourFormat.html) this seems to need different behavior depending on the platform. On android MediaQuery.alwaysUse24HourFormatOf should fully dictate the decision, but on IOS it should only force it on when true but use L10n.of(context).alwaysUse24HourFormat when false