Add resource for container app icon.

This will be referenced by the install config for the container app.

Bug: b:329710856
Change-Id: I8925fda0154ad06fce7bb4e111599fc9c4f44993
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5393889


Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Reviewed-by: Alan Cutter <alancutter@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1280005}