(timebox) Add Direct Edit actions in the activity pipe of Drive

User can see latest uploaded or downloaded documents. It would make sense to be able to see also activity around direct edit. One cold event configure which type of events he wants to see: upload, download, direct edit.
Not though that the document may not necessarily be on the desktop, in the case Drive has been restarted.
Goal of the feature: let the user have a way to check his document has been correctly saved when he hit ctrl+s or clicked on Save in its app.