Yes, you can use Airpods with iPhone 7.
The standard packaging includes, AirPods (in the charging case), Quick start guide and a lightning cable.
Yes, Apple Airpods are compitable with Samsung Galaxy S7 Edge.
You can use Apple AirPods with your Android phones. Check this video to know more on how to connect your Android phone with Apple AirPods.
Look past their offbeat design and you'll find that Apple AirPods' compact size and high convenience factor are a winning combination.