Feat(authenticator) email otp tests goldens (#5603)

* chore(authenticator): Added Emil MFA to Mock Authenticator

* chore(authenticator): Updated goldens images.

* chore(authenticator): Added missing const

Author: tyllark

packages/authenticator/amplify_authenticator/test/ui/goldens/theme_emailConfig_confirmSignInWithEmailMfaCodeStep_defaultMaterialTheme_darkMode_desktopGeometry.png

@@ -72,6 +72,7 @@ class _MockAuthenticatorAppState extends State<MockAuthenticatorApp> {
             allowedMfaTypes: {
               MfaType.totp,
               MfaType.sms,
+              MfaType.email,
             },
           ),
         );
@@ -87,6 +88,16 @@ class _MockAuthenticatorAppState extends State<MockAuthenticatorApp> {
             ),
           ),
         );
+      case AuthenticatorStep.continueSignInWithMfaSetupSelection:
+        baseBloc.setState(
+          const ContinueSignInWithMfaSetupSelection(
+            allowedMfaTypes: {
+              MfaType.sms,
+              MfaType.totp,
+              MfaType.email,
+            },
+          ),
+        );
       default:
         baseBloc.add(const AuthLoad());
         break;