Add neverallow rules to ensure successful kill by artd.

Bug: 345723405
Test: m
Change-Id: I81c583b0144f3a1a0c122cae64e302878da34809
diff --git a/private/dex2oat.te b/private/dex2oat.te
index 18600d8..3a841ce 100644
--- a/private/dex2oat.te
+++ b/private/dex2oat.te
@@ -1,5 +1,5 @@
 # dex2oat
-type dex2oat, domain, coredomain;
+type dex2oat, domain, coredomain, artd_subprocess_type;
 type dex2oat_exec, system_file_type, exec_type, file_type;
 
 userfaultfd_use(dex2oat)