Do we need to specify this? If the owner of the DataStore (in this case `Contacts`) is not specifying the status https://github.com/mozilla-b2g/gaia/blob/master/apps/communications/manifest.webapp#L167, by default is `readonly`. So in this case... Do we need to add `access` property here? or is meaningless?
On the other hand... should we specify in the owner of the DataStore the rights explicitly? Thanks!