Add SurfaceFlinger component to OWNERS for SF, RE, and libgui

Raised on b/288345762#comment3

go/xts-owners-policy is XTS-specific, but the syntax is applicable

Bug: N/A
Test: N/A
Change-Id: I97e95ad89f0226e196675cbbf7bf0fd3a948b5a2
diff --git a/services/surfaceflinger/OWNERS b/services/surfaceflinger/OWNERS
index 4734097..3270e4c 100644
--- a/services/surfaceflinger/OWNERS
+++ b/services/surfaceflinger/OWNERS
@@ -1,3 +1,5 @@
+# Bug component: 1075131
+
 adyabr@google.com
 alecmouri@google.com
 chaviw@google.com