That's a great idea but I think it will be too difficult to find those app that were containing cryptojacking. Nowadays, there are lot of pretty good apps usually when it comes to games as it attracts users to download and use it. Who knows if one of our app in our android contains cryptojacking? We can say that our apps doesn't have cryptojacking but we can't assure either. I'm afraid that even trusted android app developers will also come up to this kind of fraudulent.
I've heard one too. The last PC application I heard that were using cryptojacking is Garena. I can't believe that one of the most popular and trusted app for gamers has also became a fraud. Though, the developers claimed that they doesn't know anything about it and maybe one of them put it secretly. Visit this thread for more discussions.