Sociology and religious studies are decent since ethics and society is a big theme in law. Media is obviously not ideal but I think only absolutely top-tier unis would look down on it (Oxbridge) and even then it shouldn't be a deal breaker. Overall though these are three "easy" A-levels and if you're worried about strengthening your application I'd suggest swapping Media for something like Law or English. For the large majority of unis however, the three you've chosen should be fine if you get good grades.
There are NO required subjects for Law - and Unis now have to be totally upfront and honest about entry requirements. - for all courses.
There are no secrets or 'information that only special people know'.
And Unis do not 'look down' on certain subjects or rank A levels as easy / non-easy - they are all just 'A levels' and Media is as good as any other subject for Law.