Add OWNERS file under car-helpers

Bug: 138318250
Test: Build a test using platform_testing/libraries
Change-Id: Ib74ede73ff9854c3dfd2d8d98bc325675dde1123
diff --git a/libraries/car-helpers/OWNERS b/libraries/car-helpers/OWNERS
new file mode 100644
index 0000000..6d151a8
--- /dev/null
+++ b/libraries/car-helpers/OWNERS
@@ -0,0 +1 @@
+aceyansf@google.com