Add Raphael as OWNER in sensors/ and wakelock/.

Raphael apart from leading the efforts for wake_lock/, has been helping
us in reviewing sensors/ code for some time.

Bug: None.
Change-Id: Id75ccd03282be7b618d8ff7b05fb2d42c9dfb8ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2160999
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Auto-Submit: Rijubrata Bhaumik <rijubrata.bhaumik@intel.com>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762000}

services/device/generic_sensor/OWNERS

 juncai@chromium.org
+raphael.kubo.da.costa@intel.com
 timvolodine@chromium.org
 
 # COMPONENT: Blink>Sensor

third_party/blink/renderer/modules/sensor/OWNERS

+raphael.kubo.da.costa@intel.com
 reillyg@chromium.org
 rijubrata.bhaumik@intel.com
 timvolodine@chromium.org

third_party/blink/renderer/modules/wake_lock/OWNERS

 mlamouri@chromium.org
+raphael.kubo.da.costa@intel.com
 reillyg@chromium.org
 
 # COMPONENT: Blink>WakeLock