push_notification

[1]Firebase Integration in Flutter project.
[2]Parsing message in the app using on Message Stream while the app is foreground.
[3]Handling click action on Push notifications like navigation while the app is in the background (app opened).
[4]Parsing message in the app using on BackgroundHandler Stream while the app is background.
[5]Handling click action on Push notifications like navigation while the app is in the background (app closed).
[6]Creating Notification Channel to show heads up notification using flutter_local_notification.
[7]Displaying heads up notification while the app is in the foreground.
[8]Displaying heads up notification while the app is in the background.
[9]Handling on tap notification while the app is in the foreground.