Replace shenghao with shik in OWNERS list

This CL replaces shenghao with shik in OWNERS and other lists, since
shenghao is leaving CrOS team.

Bug: None
Test: It compiles
Change-Id: Id072c52e10c8044aaa55d2a6b6435bfe1613aab9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1741343
Auto-Submit: Sheng-hao Tsao <shenghao@chromium.org>
Reviewed-by: Shik Chen <shik@chromium.org>
Commit-Queue: Sheng-hao Tsao <shenghao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684684}