Add benreich to OWNERS

Adding an APAC reviewer to unblock trivial reviews.

Bug: None
Test: None
Flag: EXEMPT owners change
(cherry picked from https://android-review.googlesource.com/q/commit:06d1ae7d31bfa9d92605a8d5fd09fd2f1b47e8b5)
Merged-In: I700f078e2073e0c44b9ec8dc408349f7b6480305
Change-Id: I700f078e2073e0c44b9ec8dc408349f7b6480305