I think I found a way - not sure as this the correct one.
From the client install feature set, add a client install feature, named as AV and AS only, then select only AV part, untick others, then save it. Now I found the newly added AV and AS only while exporting a client package under select feature tab.
Need to test this package to make sure - whether the task accomplished or not.
Your Feedback appreciated.
Thanks,
Anver