Introduce NICViewModel#iconsViewData

Replaces the older monolithic icon binding logic with a new Recommended
Architecture stack.

Flag: NOTIFICATION_ICON_CONTAINER_REFACTOR
Bug: 290787599
Bug: 278765923
Test: atest SystemUITests
Change-Id: I7fca26aab96c3ff7cef389e04000550284da977a
30 files changed