Android: Add “Duplicate” or "Copy post" functionality

[nozomimimi]

Expected behavior

Currently on the mobile app, "Duplicate post" functionality is not available. (It exists on Calypso, see the image below)
We should bring this functionality to the mobile app.

[osullivanchris]

Behaviour per Calypso:

• When a user chooses the 'copy' option on a post, they are launched straight into the editor
• All of the content from the existing post is copied over to the new post. However the duplicate post acts as a 'new' post in that it is a draft without any status selected yet, regardless of whether it was duplicated from a published or draft post
• The post has the exact same title name. So "Superman or Batman" creates another post also called "Superman or Batman", not appended by v2, copy, etc
• The Android design can be implemented with existing UI, just adding to the menu
• The iOS design is dependent on Post List Revamp Master Issue WordPress-iOS#11646 where we have the more flexible sheet menu

[osullivanchris]

iOS designs ready too. Should we create a separate iOS task or change the name / location of this task?

[megsfulton]

🚢🚢🚢

[antonis]

Fixed with #13521