Add placeholder iris and face policy for vold data directory

This is PS1 of aosp/828283 which was reverted. Using PS1 shouldn't cause
the same issue.

Test: vold is able to create directories, ag/5534962

Bug: 116528212
Change-Id: I84aca49a8dae0a087498120780dea0962aca04b3
diff --git a/private/vold_prepare_subdirs.te b/private/vold_prepare_subdirs.te
index 0d062e9..e93e1e5 100644
--- a/private/vold_prepare_subdirs.te
+++ b/private/vold_prepare_subdirs.te
@@ -14,12 +14,16 @@
   vendor_data_file
 }:dir { open read write add_name remove_name rmdir relabelfrom };
 allow vold_prepare_subdirs {
+    face_vendor_data_file
     fingerprint_vendor_data_file
+    iris_vendor_data_file
     storaged_data_file
     vold_data_file
 }:dir { create_dir_perms relabelto };
 allow vold_prepare_subdirs {
+    face_vendor_data_file
     fingerprint_vendor_data_file
+    iris_vendor_data_file
     storaged_data_file
     system_data_file
     vold_data_file