Add owners for chromeos/components/power/

BUG=None
TEST=Compile.

Change-Id: I35b315c6a72f4b3d2d8d6f23547e138d0c2abb20
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1738144
Commit-Queue: Abhishek Bhardwaj <abhishekbh@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684354}

chromeos/components/power/OWNERS

+abhishekbh@chromium.org
+ejcaruso@chromium.org
+ravisadineni@chromium.org
+
+# COMPONENT: OS>Kernel>Power