GitLab

Only allow approved topics to be displayed. All topics are defaulted to
false and must be enabled by finch params.

BUG=b:167458920
TEST=turn on ambient mode with "GeoPhotosEnabled" param set to false.

Cq-Include-Trybots: luci.chrome.try:linux-chromeos-chrome
Change-Id: I2ce8057999279d4792840ce99cd379edba2955ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422583
Commit-Queue: Jeffrey Young <cowmoo@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Reviewed-by: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810081}