[Android] Add bsazonov to c/a/OWNERS

Bug: None
Change-Id: I5ddaa706589b2a7f426dffbd75fdf040bc16f14c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913213
Auto-Submit: Boris Sazonov <bsazonov@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714922}

chrome/android/OWNERS

 agrieve@chromium.org
+bsazonov@chromium.org
 dtrainor@chromium.org
 mthiesse@chromium.org
 nyquist@chromium.org