GitLab

1. Adds Wifi Sync to Multidevice Subpage
2. Update tests to include Wifi Sync
3. Adds new search string tags for Wifi Sync
4. Refactored conditionally adding features to
GetMultiDeviceOptedOutSearchConcepts

Bug: 1117619
Change-Id: Iac0b065b2d1f244ae1318e6e69415a626c10d39a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2386395Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Jon Mann <jonmann@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Claude van der Merwe <cvandermerwe@google.com>
Cr-Commit-Position: refs/heads/master@{#803899}