Continuously repeated animations go against accessibility guidelines
to avoid unstoppable motion.
The animation files themselves have been updated to loop twice
so that the user can still see the animation temporarily.
The loop restarts if the user exits and enters the page again.
Bug: 370661517
Flag: EXEMPT minor bugfix with resource changes
Test: Manually observe animations
Change-Id: I52348a094680ef345bf8c2b12ab91c9406bf5cb4
5862b31f21