s13n: Replace use of AccountTrackerService in advanced_protection_status_manager.cc/h

As a step to use IdentityManager, this CL makes AdvancedProtectionStatusManager implement
IdentityManager::Observer instead of AccountTrackerService::Observer.
Besides, AccountTrackerService::SetIsAdvancedProtectionAccount is also replaced by
AccountMutator::UpdateAccountInfo

Bug: 922761, 922762
Change-Id: Ia223d792f745e4d0057eb1426389645ec9083aee
Reviewed-on: https://chromium-review.googlesource.com/c/1426503
Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625486}
2 files changed