Make Feature Policy Reporting a Runtime-Enabled feature and count usage

Bug: 867471
Change-Id: Id018134cab083690bfc4168f880cfbcd835a0cbb
Reviewed-on: https://chromium-review.googlesource.com/1191092
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586746}
6 files changed