[PM-6977] Migrate to FCM v1 (#3917)

* fcmv1 update

* try without nested data obj

* type must be a string

* fcmv1 migration flag

* lint fixes

* fix tests

---------

Co-authored-by: Matt Bishop <mbishop@bitwarden.com>

test/Core.Test/Services/NotificationHubPushRegistrationServiceTests.cs

@@ -12,18 +12,21 @@ public class NotificationHubPushRegistrationServiceTests
     private readonly NotificationHubPushRegistrationService _sut;
 
     private readonly IInstallationDeviceRepository _installationDeviceRepository;
+    private readonly IFeatureService _featureService;
     private readonly ILogger<NotificationHubPushRegistrationService> _logger;
     private readonly GlobalSettings _globalSettings;
 
     public NotificationHubPushRegistrationServiceTests()
     {
         _installationDeviceRepository = Substitute.For<IInstallationDeviceRepository>();
+        _featureService = Substitute.For<IFeatureService>();
         _logger = Substitute.For<ILogger<NotificationHubPushRegistrationService>>();
         _globalSettings = new GlobalSettings();
 
         _sut = new NotificationHubPushRegistrationService(
             _installationDeviceRepository,
             _globalSettings,
+            _featureService,
             _logger
         );
     }