Added in_app_updater package

[BrawlerXull]

Description

Add in_app_update feature to prompt user to update app on next build releases on playstore

Fixes #(issue_no)

353

Screenshots

Checklist

• [ ] Tests have been added or updated to cover the changes
• [ ] Documentation has been updated to reflect the changes
• [X] Code follows the established coding style guidelines
• [ ] All tests are passing

[Pavel401]

@BrawlerXull , please fix the conflicts. Could you let me know if you were able to test this package?