[GM3] Add gm3 icons to realbox

This CL adds replaces the realbox icons with their updated GM3
counterparts. The icons were gotten from UX.

Bug: 1491232
Change-Id: I9976db3e092cb5d74d2b746410e6c40080297d7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4922113


Reviewed-by: John Lee <johntlee@chromium.org>
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Commit-Queue: Nihar Majmudar <niharm@google.com>
Reviewed-by: Marlon Facey <mfacey@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1218979}