It is practically impossible for India to get involved in Afghanistan, militarily. It will be a logistical nightmare. There are not supply route to Afghanistan, other than through Pakistan or Iran. My Pakistani friends will gladly offer their opinion, about Pakistan cooperating with India for supporting and maintaining Indias military logistics in case of Afghanistan deployment.
Iran is the other supply route. Iran is a good friend of India. But, a request for a supply line for Afghan involvement will test the strength of Indias friendship.
No army can survive on Air supply. In my opinion, this was just a pressure tactic being used by Uncle Sam on Pakistani Military to deliver results.