Refine optimize page log pattern

 - Add timestamp and prefix string
 - Chagne Action.MANUAL to LEAVE for better readability
 screenshot: https://screenshot.googleplex.com/ALTvMaPWVEq8y7c.png

Bug: 192523697
Test: make SettingsRoboTests
Change-Id: I69d1beceb98444d823f6ffc3a015cf61a7d7a66d
4 files changed