Enhance V3 extension class to integrate JSON Home data

The V3 extension class is enhanced to intercept JSON Home responses
and modify the response to include any JSON Home data that the
extension provides. Note that there is no JSON Home data provided
yet.

bp json-home

Change-Id: I940cef418b9a2f199ebd804b66dabe688f4845b8
Merge "Enhance V3 extension class to integrate JSON Home data"