TF-1205: rename class

lib/features/push_notification/data/datasource/fcm_datasource.dart

@@ -0,0 +1,10 @@
+
+import 'package:model/fcm/fcm_token_dto.dart';
+
+abstract class FCMDatasource {
+  Future<FCMTokenDto> getFCMToken(String accountId);
+
+  Future<void> setFCMToken(FCMTokenDto fcmToken);
+
+  Future<void> deleteFCMToken(String accountId);
+}