documenation of default values of settable SDK items

### Description of the Issue
Where are the default values documented?
Some are here: https://github.com/box/box-java-sdk/blob/main/doc/configuration.md
like: `Maximum retries = default value for retry attempts is 5.`

But missing default for other items we can set https://opensource.box.com/box-java-sdk/javadoc/com/box/sdk/BoxAPIConnection.html

### Expected Behavior
All default values are documented.