Change code to make it more clear that we're skipping the beginning of the JSONP

What we need is the JSON that is used as parameter in the JSONP call

Author: nikolaseu

core/src/main/java/com/auth0/authentication/api/internal/ApplicationInfoRequest.java

@@ -99,7 +99,7 @@ private Application parseJSONP(Response response) {
             if (json.length() < 16) {
                 throw new JSONException("Invalid App Info JSONP");
             }
-            json = json.substring(16); // replaces tokenizer.skipPast("Auth0.setClient(") because official (not android's) org.json does not have the method
+            json = json.substring("Auth0.setClient(".length()); // replaces tokenizer.skipPast("Auth0.setClient(") because official (not android's) org.json does not have the method
             JSONTokener tokenizer = new JSONTokener(json);
             if (!tokenizer.more()) {
                 throw tokenizer.syntaxError("Invalid App Info JSONP");