added onRequestedReview callback

[mopi1402]

Added a callback when requestReview is trigged !

I'm using it for Google Analytics for example, like here :

serviceLocator<AdvancedInAppReview>()
        .setMinDaysBeforeRemind(7)
        .setMinDaysAfterInstall(2)
        .setMinLaunchTimes(5)
        .monitor(
          onRequestedReview: () =>
              serviceLocator<FirebaseAnalytics>().logEvent(name: 'app_review'),
        );

[eeoom]

There is no way to determine if the system really shows the rating view. The corresponding API only allows to inform the system, that it may show it. It's up to the system if its shown. According to some parameters, it will not show anything even the request is triggered. So I wonder if such a callback makes sense ...

[mopi1402]

Yes, in fact, and just want to check that the requestReview was called.
I don't want to know if the dialog appears, that as you mentionned, it's not possible.

May be it's useless, and I will remove it when I will see some events on Firebase :)

[mopi1402]

Ok, so now I'm seeing event on Firebase Analytics :

As you notice, it's not possible to know if someone made a review from this dialog (and if the dialog has opened), but I'm sure I integrated you lib correctly and it's working on production ;)

Thank you for you work !

[StarProxima]

@eeoom Can you consider this pr again?