Refactor finalization scripts.

Bug: 264308911
Test: run locally
Change-Id: I60fa1e1121fafb617d8508403fae07f0bdf39e66
diff --git a/tools/finalization/OWNERS b/tools/finalization/OWNERS
new file mode 100644
index 0000000..518b60d
--- /dev/null
+++ b/tools/finalization/OWNERS
@@ -0,0 +1,5 @@
+include platform/build/soong:/OWNERS
+smoreland@google.com
+alexbuy@google.com
+patb@google.com
+zyy@google.com