fix(SUW): Update A11y Settings pages to use new expressive style

Bug: 346560989
Test: Keep flags disabled; observe no visual change
Test: Flip Setup and Settings flags; observe visual changes
      See bug for screenshots
Flag: EXEMPT using non-standard flagging from ThemeHelper
Change-Id: Ie81594dd113af38a03f4215e8bb5c928bcfb1ef5