Implement Site Settings - .org

[daniloercoli]

Calypso Site Settings - .com - has been implemented in #3568

.org site settings are still missing. Ref: wordpress-mobile/WordPress-FluxC-Android#85

[maxme]

There was a .org site settings but I think XMLRPC endpoint is still missing. https://github.com/wordpress-mobile/WordPress-Android/blob/f02ff4ad9e514e9dfbfcb7a203e8e55b6b347fa5/WordPress/src/main/java/org/wordpress/android/ui/prefs/SelfHostedSiteSettings.java

[stale]

This issue has been marked as stale and will be automatically closed. This happened because:

• It has been inactive for the past year.
• It isn't in a project or a milestone.
• It hasn’t been labeled `[Pri] Blocker`, `[Pri] High`, or `good first issue`.

However, discussion is still welcome! If the issue is still valid, please leave a comment with a brief explanation so the issue can be reopened.