Updated OWNERS files

Test: Nothing
Bug: None
Change-Id: Ib055cbb8884b7a3ffa24f70d1e3ed610ac5024be
diff --git a/services/surfaceflinger/OWNERS b/services/surfaceflinger/OWNERS
index 6bb999c..c5a4689 100644
--- a/services/surfaceflinger/OWNERS
+++ b/services/surfaceflinger/OWNERS
@@ -7,3 +7,4 @@
 steventhomas@google.com
 stoza@google.com
 vhau@google.com
+vishnun@google.com