Add CDM core test OWNERS file

Bug: 270014877

Change-Id: I247b271fd71658fb80323842e8e0d7542464c4c9
Test: m build
diff --git a/core/tests/companiontests/OWNERS b/core/tests/companiontests/OWNERS
new file mode 100644
index 0000000..734d8b6
--- /dev/null
+++ b/core/tests/companiontests/OWNERS
@@ -0,0 +1 @@
+include /core/java/android/companion/OWNERS
\ No newline at end of file