OWNERS files updated with latest COMPONENT and TEAMS.

This is CL is generated by a script. Data is pulled from
review conducted in Q2 2019. See https://tinyurl.com/yxau5sc4
for context.

NOPRESUBMIT=true
Set due to authors in OWNERS files having issues with LGTM. They will be fixing this separately.

Bug: 977050
Change-Id: I997300c3bf79c789d5270ea3c0c47197b2d045b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1725159Reviewed-by: Eric Foo <efoo@chromium.org>
Commit-Queue: Eric Foo <efoo@chromium.org>
Auto-Submit: Eric Foo <efoo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683454}

third_party/openh264/OWNERS

 sprang@chromium.org
 ssilkin@chromium.org
+# COMPONENT: Blink>WebRTC>Video
+# TEAM: webrtc-reviews@webrtc.org