Use contains() rather than looping

[brh]

This is in reference to the subscribe method where you "for (Subscription subscription : subscriptions)"
it would be better to just do subscriptions.contains(newSubscription) right?

Using the syntactic sugar for loop is a tiny performance hit in Android anyway...
http://developer.android.com/training/articles/perf-tips.html#Loops (last line of section), there was also a presentation I saw somewhere where they said the syntactic sugar for loop also uses more memory.