Add OWNERS for Wake Lock API

Also remove orphaned selectors/OWNERS (directory moved)

Change-Id: I519ae83ef049a92ada59a2c4ca458d5c8e31a850
Reviewed-on: https://chromium-review.googlesource.com/765493Reviewed-by: Vincent Scheib <scheib@chromium.org>
Commit-Queue: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516116}

third_party/WebKit/LayoutTests/external/wpt/selectors/OWNERS

-# TEAM: style-dev@chromium.org
-# COMPONENT: Blink>CSS

third_party/WebKit/LayoutTests/external/wpt/wake-lock/OWNERS

+file://third_party/WebKit/Source/modules/wake_lock/OWNERS

third_party/WebKit/Source/modules/wake_lock/OWNERS

+alogvinov@yandex-team.ru
+
+# COMPONENT: Blink>WakeLock
+# TEAM: device-dev@chromium.org