animation: Correctly name the animation classes

fade-in to fade-in-up
fade-out to fade-out-down

Change-Id: I6e8877a509fdb3e3f570e16d59438bff61e2615a
animation: Add fade animations from other directions

1. fade-in-down
2. fade-out-up

Change-Id: I108b6bb6bbb8ac49401e9dc0d6599e57c42abf62
Flip the animation direction if the Hovercard is flipped

Change-Id: I890d49c517a52e57e0b22bcf1949b347d531d6b7