GitLab

Adding UI features required for static microphone and camera
permissions. When permissions are shifted to a dynamic model, much of
this code will be changed/removed.

Screenshots: https://drive.google.com/drive/folders/1m66pUVmnhGa1BRc1JABzYpgsvJk8OCKj?usp=sharing
Testing: Implemented and ran browser-tests, tested UI locally

Bug: 1071872
Change-Id: Ib882acc57896a3c273e5484d5ce242e08667febc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2264175
Commit-Queue: Daniel Ng <danielng@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Jimmy Gong <jimmyxgong@chromium.org>
Reviewed-by: Jeevan Shikaram <jshikaram@chromium.org>
Cr-Commit-Position: refs/heads/master@{#783809}