fix(auth): retry probe when UIApplication.delegate is nil in Flutter apps

[videjunior]

…apps

When using Firebase Phone Auth in Flutter apps, the UIApplication.delegate can be nil at the moment the notification probe fires in DispatchQueue.main.async, because FlutterAppDelegate is assigned asynchronously by the Flutter plugin system after launch.

This causes I-AUT000015 to be logged and phone auth to fail even when the AppDelegate is correctly configured with canHandleNotification.

Fix: replaced DispatchQueue.main.async with Task {} and added up to 10 retries with 300ms delay (3s total) to wait for the delegate to become available. If the delegate is not found after all retries, we signal forwarding as true since the AppDelegate was configured correctly.

Fixes:

#55

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[ncooke3]

Thanks for the PR, @videjunior! We can take a look when the CLA is signed.

[ncooke3]

Also, is there a issue to reference from the Flutter repo?

[videjunior]

Also, is there a issue to reference from the Flutter repo?

Yes, there is. Issue number 55 was closed due to inactivity.
#55