This is documented in the IBM
What this is saying is that if you download the Traveler client using the Browser that came with the Android OS (Usually labelled simply ‘Internet’) the Server name and Username will fill in and after installing the configuration screen will look like this
What is becoming increasingly common is that people are using Chrome or Firefox on their Android devices and ignoring the default browser.  When using the non-default browser after installing your configuration screen will look like  this
Traveler will still configure correctly but you will have to manually fill in your server name, and user name to complete the configuration.