GitLab

* Added string converters for ScreenlockState and
RemoteDeviceLifeCycleState
* Removed 'generating EIDs' log
* Removed duplicate life cycle log

R=khorimoto@chromium.org

Bug: none
Test: none
Change-Id: I40e8b5e43b1e2dc29d6542aae33b6af8b78ca722
Reviewed-on: https://chromium-review.googlesource.com/1042962Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555875}