Currently India has longer ranged missile, but yet susceptible to simple ECMs. The Su-30 won't have such a simple task to avoid the Aim-120 once its fired.
You need to remember that Israel has using Aim-120 for ages.Plus Jordon has recieved Aim-120 as well. Hence there is every possibility that Israel already has a ECM for Aim-120. I would say IAF has already asked the ECM for Aim-120.
Beside Pakistan isn't recieving the latest version anyway.
Just observe there has no noise from IAF regarding Aim-120 induction other than the usual "will increase combact capability stuff". Ever wondered why?
It helps to have allies in the right place