Implement the new UI design for the category tiles in the wallpaper
picker.

Screenshot: https://screenshot.googleplex.com/OZvuf2bx6bO.png
deck: https://docs.google.com/presentation/d/15JadcGi5k1_0znUN_XdFpU7UxeXwxjK3Y7LxvhW5ETM/edit#slide=id.g7c8f4a82bf_0_154

Bug: 149000013
Change-Id: I687c77eeb02d2df841fbb1b4630309d18da73b10
6 files changed