Various custom flow fixes.

- Remove "tap to edit" on individual custom cards
- Remove "X of 4" on custom flow
- Change title of custom Icon page to "Icon"
- Fix stroke width of custom flow adaptive icons

Fixes: 130758665
Fixes: 130762720
Fixes: 130763472
Fixes: 130763336
Test: visual
Change-Id: I38fa12d9176ce3910db84eeb21d43030ece27aa7