TF-1923 Fix duplicated store new email from push notification

(cherry picked from commit 076bbe249cc870b944a2dc40bc31012e061e0897)

lib/features/email/domain/exceptions/email_cache_exceptions.dart

@@ -5,4 +5,6 @@ class NotFoundStoredNewEmailException implements Exception {}
 
 class NotFoundStoredEmailException implements Exception {}
 
-class OpenedEmailAlreadyStoredException implements Exception {}
+class OpenedEmailAlreadyStoredException implements Exception {}
+
+class NewEmailAlreadyStoredException implements Exception {}