Add theme info sheet to theme full preview page

Mock: https://docs.google.com/presentation/d/15JadcGi5k1_0znUN_XdFpU7UxeXwxjK3Y7LxvhW5ETM/edit?ts=5ebdb4b0#slide=id.g7c8f4a82bf_0_268

Screenshot:
https://screenshot.googleplex.com/S1BuS1A52eP.png
https://screenshot.googleplex.com/mi3Yafmfibw.png

Test: Manually
Bug: 151286773
Change-Id: I1b3c68f6063b50951a757117259227b67a119731