title: Retrofit2 scalar converter not converting before gson converter android
body: <p>I have the following retrofit2 in Android with the scalar converter factory first and gson converter after but when I call a String Call and the response comes as a string it gives me the exeption "Not a JSON object: "success".</p>
  
  <p>Am I missing anything?</p>
  
  <p>Retrofit creation:</p>
  
  <pre><code>Retrofit retrofit = new Retrofit.Builder()
                  .addConverterFactory(ScalarsConverterFactory.create())
                  .addConverterFactory(GsonConverterFactory.create(gson))
                  .baseUrl(IPService.END)
                  .client(new OkHttpClient.Builder().build())
                  .build();
  </code></pre>
  
  <p>Call creation:</p>
  
  <pre><code>@POST("/friends/sendRequest")
  Call&lt;String&gt; sendFriendRequest(...);
  </code></pre>
  
  <p>Call Execution:</p>
  
  <pre><code>Response&lt;String&gt; a =  myApi.sendFriendRequest(...).execute();
  </code></pre>
  
  <p>Reponse body is "Success".</p>