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/file_contexts b/private/file_contexts
index acd5df9..493d782 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -484,6 +484,12 @@
 # Fingerprint vendor data file
 /data/vendor_de/[0-9]+/fpdata(/.*)? u:object_r:fingerprint_vendor_data_file:s0
 
+# Face vendor data file
+/data/vendor_de/[0-9]+/facedata(/.*)? u:object_r:face_vendor_data_file:s0
+
+# Iris vendor data file
+/data/vendor_de/[0-9]+/irisdata(/.*)? u:object_r:iris_vendor_data_file:s0
+
 # Bootchart data
 /data/bootchart(/.*)?		u:object_r:bootchart_data_file:s0