For each application that had an update check performed, a new App (potentially with new Cohort
and UserCounting data) and a corresponding response Action are returned from the update check.
The Context provides the protocol context for a given update check operation. This is
information that’s passed to the Policy to allow it to properly reason about what can and cannot
be done at this time.
The response context from the update check contains any extra information that Omaha returns to
the client, separate from the data about a particular app itself.
The Action is the result of an update check for a single App. This is just informational, for
the purposes of updating the protocol state. Any update action should already have been taken
by the Installer.