Add patching capabilites to demo app

[jcnoriega]

Reason for changes

We werent able to test the complete flow of shipping change for NXO, now we can.

Summary of changes

• Add pacthing capabilities to Demo app.

Selecting a new shipping method:

https://user-images.githubusercontent.com/10046176/232631340-8edd6ad9-7196-4658-8f6e-e37436a97ef2.mov

Selecting a new address, that gets rejected:

https://user-images.githubusercontent.com/10046176/232631800-f662e831-00b6-47af-9811-ef015d6101bf.mov

Checklist

• [ ] Added a changelog entry

Authors

List GitHub usernames for everyone who contributed to this pull request.

• @jcnoriega