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This is the first CL of hindsight which creates the CrOSActionRecorder

(1) CrOSActionRecorder is a singleton,

(2) CrOSActionRecorder has one public function RecordAction.

(3) CrOSActionRecorder writes action history periodically to disk.

Bug: 1012936
Change-Id: Ie364e98cc5eb099a5743b27134ec3bc10363d142
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1846612
Commit-Queue: Charles . <charleszhao@chromium.org>
Reviewed-by: Tony Yeoman <tby@chromium.org>
Reviewed-by: Charles . <charleszhao@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705703}