title: How to have persistent badge icon on iOS using Flutter
body: <p>Is it possible to use flutter to keep the notification badge on the app icon even after opening and closing the app? Ex.: user has a badge of value 6, opens app to read one message, closes app, badge now reads as 5. </p>
  
  <p>How do I achieve this functionality? (Specifically looking for iOS solution, but also interested in hearing about Android side if you have tips)</p>