feat: store age ratings in DB (issue 2265)

Description

Store age ratings in DB table for offline functionality.

Screenshots

Technical details

Tests

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/2265

10 commandments of code reviews

👪 ❤ https://gitlab.e.foundation/internal/wiki/-/wikis/mobile-team/guidelines/Code-review

Summary by CodeRabbit

• New Features

  • Enhanced app age limit validation to include content ratings from Google Play.
  • Added the ability to fetch and store content ratings in a database.
  • Introduced logic to manage NSFW apps and age groups.

• Refactor

  • Simplified package management logic in the onReceive method.
  • Updated methods to use a class-level JSON converter for serialization and deserialization.

• Bug Fixes

  • Corrected validation logic to check content rating validity.
  • Fixed issues with canceling downloads by including package names.

• Chores

  • Added new Data Access Objects (DAOs) and data classes for managing content ratings.