Privacy Browser Android

Currently it returns a boolean on the `isBlocked()` method. It could be refactored to return a String[] on a `checkBlockList()` method. This would unify how whitelist and blacklist entries are handled. But I'm not sure it is the way to go. It might increase the complexity of handling user block lists as described in https://redmine.stoutner.com/issues/181, which will handle whitelist entries differently as whitelist hits will override entries in other blocklists (they are a global whitelist), which they don't do for the standard blocklists (which are local whitelists).