You don't really provide enough information (such as what plugins you've tried, why they don't work, what Android version(s) you are targeting, etc).
Now, for my personal two cents:
Please don't create apps that do this -- I don't think this is a good idea from an end-user perspective in the first place -- determining which apps a user has installed is a privacy concern, and not something your app should really be depending on. (It's one thing to fire off intents than the user's apps can handle if desired, it's another to track the apps a user has installed.) Never mind that it feels really spammy and invasive in the first place (and leaves a really bad taste in my mouth), and you're going to be rejected in at least the Apple app store (should you ever wish to expand).