While Club Penguin has not officially announced that they are working on a Puffle Wild app for Android, a listing on a Disney employee’s LinkedIn profile confirms that it is indeed in the works. It says that the employee in question has worked on Puffle Wild for both iOS and Android, as shown. To respect their privacy I won’t be linking to their LinkedIn profile.
When Puffle Wild will make a debut on Android is currently unknown. It is also unknown if and when Sled Racer will come to Android.
UPDATE: Coincidence or not, but shortly after making this post the employee removed Android from their profile.
Thanks Pen50gi for the tip!