os settings: launch personalization hub from settings search result

Launch personalization hub for search results related to ambient mode,
user avatar and dark/light color mode. This is a follow up of
https://crrev.com/c/3350246

Bug: b/202851985
Test: Manually

Cq-Include-Trybots: luci.chrome.try:linux-chromeos-chrome
Change-Id: I7da7dd4896b5aaf8775637383631ff99286ca5b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3370450


Reviewed-by: Jeffrey Young <cowmoo@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Jason Thai <jasontt@chromium.org>
Cr-Commit-Position: refs/heads/main@{#956775}