viz: Add self to OWNERS for overlays on Android.

R=ericrk@chromium.org

Change-Id: I63db25f6e805dd644e42cc1c64f4f650c36d2812
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1805716
Auto-Submit: Khushal <khushalsagar@chromium.org>
Commit-Queue: Eric Karl <ericrk@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696935}

components/viz/OWNERS

@@ -47,6 +47,7 @@ flackr@chromium.org
 # overlays
 ccameron@chromium.org
 dcastagna@chromium.org
+khushalsagar@chromium.org
 
 # scheduling / begin frames
 sunnyps@chromium.org