Add new preview for theme picker (Part2)

- Add some contents to the preview screen(Mostly reuse the old one)
- Will check with UX the small preview spec, now we just put them there first.
- Video: https://drive.google.com/file/d/18rrT6XsqVnhuMTrLM-A6jVn_sHF379eE/view?usp=sharing

Test: Manually
Bug: 146475648
Change-Id: I06f1a38454861f46531dca228b649068f46c71ad