Add owners for window coretest

Test: upload check
Bug: 159767464
Change-Id: I998f4030e62fcc090491ec5fe873b4f5749f356e
diff --git a/core/tests/coretests/src/android/window/OWNERS b/core/tests/coretests/src/android/window/OWNERS
new file mode 100644
index 0000000..6c80cf9
--- /dev/null
+++ b/core/tests/coretests/src/android/window/OWNERS
@@ -0,0 +1,2 @@
+include /services/core/java/com/android/server/wm/OWNERS
+charlesccchen@google.com