Tweak UI of CardPreference and ContextualCard

- CardPreference uses settingslib_preference
  layout to fix title/summary alignment issue.

- Remove stroke for CardPreference and ContextualCard.

- Set colorSurface as default card background color.

Bug: 188599776
Test: manual visual
Change-Id: Id0ee40be60de1f7605849490ee43eae4b9420abb