Add billorr@chromium.org to OWNERS for some files

Change-Id: If9e9d590cc59d9af204eb3a3f8bf975173ed00de
Reviewed-on: https://chromium-review.googlesource.com/794309Reviewed-by: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Bill Orr <billorr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520179}

device/vr/OWNERS

 bajones@chromium.org
+billorr@chromium.org
 mthiesse@chromium.org
-kbr@chromium.org
-hendrikw@chromium.org
-girard@chromium.org
 
 per-file *.mojom=set noparent
 per-file *.mojom=file://ipc/SECURITY_OWNERS
 
-# COMPONENT: UI>Browser>VR
+# COMPONENT: Internals>VR

third_party/openvr/OWNERS

 bajones@chromium.org
+billorr@chromium.org
 ddorwin@chromium.org