Include component ID in OWNERS file

By default all flicker tests use the Winscope component.

Change-Id: Ibacb1d247807ac1cbef6b4219b8966a87eccdb5c
Test: check the owner files
diff --git a/tests/FlickerTests/OWNERS b/tests/FlickerTests/OWNERS
index f35a318..b556101 100644
--- a/tests/FlickerTests/OWNERS
+++ b/tests/FlickerTests/OWNERS
@@ -1,2 +1,3 @@
+# Bug component: 909476
 include /services/core/java/com/android/server/wm/OWNERS
 natanieljr@google.com
\ No newline at end of file