Pass argument "wpcom_supports_2fa" when requesting a new 2FA code

fluxc/src/main/java/org/wordpress/android/fluxc/network/rest/wpcom/auth/Authenticator.java

@@ -234,6 +234,7 @@ public TwoFactorRequest(String appId, String appSecret, String username, String
             if (shouldSendTwoStepSMS && TextUtils.isEmpty(twoStepCode)) {
                 mParams.put("wpcom_resend_otp", "true");
             }
+            mParams.put("wpcom_supports_2fa", "true");
         }
     }