We received the first edition of Hard Candy Cases' ShockDrop for iPad Air ($50) back in June, back when the company was originally expecting the "iPad 5" to launch. Now that Apple has made its official announcement, we've received a second, updated unit for review. The design is based very heavily on previous ShockDrop cases, including the iPad mini model, which was notably the first case we received for that device. It's comprised of a hard plastic…