Update extensions/browser/api/system_*/OWNERS.

Add new owners and remove inactive owners.

Change-Id: I4dc7dc5317ea7b261ef7794072f85c58db1b33a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1504305
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Leon Han <leon.han@intel.com>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637927}
5 files changed