battery_updater: Add OWNERS file

This CL is populating OWNERS file based on the candidates in the Chrome OS OWNERS status sheet.

BUG=b:132095048
TEST=None

Change-Id: I88d882775c371136c4a0f0989102a88575b8cd6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/battery_updater/+/1682778
diff --git a/OWNERS b/OWNERS
index af7a7f5..ef513b6 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1 +1 @@
-ssl@chromium.org
+vapier@chromium.org