Companies in adtech, e-commerce like Flipkart, Inmobi (perhaps their fraud detection unit), Amazon, Near (formerly adNear) have developed capabilities.
There's AI/ML work happening in computer vision happening at places like Grey Orange (disclaimer, I was formerly an employee there), Tonbo Imaging.
R&D within large conglomerates have lots of AI/ML like IBM Watson, Target, TCS Innovation Labs, 24/7, MSFT Research (Cognitive Linguistics etc), Xerox R&D
Startups like Gramaneer, SocialCops, Crayon Data are also working within AI/ML realm (though I am not aware, how deep they go into it).
University groups focusing on this in India from what I know are at IISc and IIIT Hyderabad and IIT B (post graduate).
"At the moment, progressive apps will only work on Android."
Who is to say that iOS will expose all the APIs and permissions to progressive web apps, that it does for native apps? Even on Android, it requires Chrome. Unfortunately, this takes away half of the advantage of web apps.
However, if you only want to target Android and Web, this may be potentially useful.