Revert "Revert "Revert "Revert "vold now prepares a subdirectory for face data.""""

Bug: 116528212

This reverts commit 8973e2d5d098f08b1a26110a4b67d3f8aea2c6ee.

Reason for revert: Will submit after selinux issues are resolved

Change-Id: Ie2df91b33be70629e8c08fdbcc6e7ad0faea13a9
diff --git a/vold_prepare_subdirs.cpp b/vold_prepare_subdirs.cpp
index 8c3df30..b8e5cb6 100644
--- a/vold_prepare_subdirs.cpp
+++ b/vold_prepare_subdirs.cpp
@@ -133,6 +133,10 @@
             if (!prepare_dir(sehandle, 0700, AID_SYSTEM, AID_SYSTEM, vendor_de_path + "/fpdata")) {
                 return false;
             }
+            auto facedata_path = vendor_de_path + "/facedata";
+            if (!prepare_dir(sehandle, 0700, AID_SYSTEM, AID_SYSTEM, facedata_path)) {
+                return false;
+            }
         }
         if (flags & android::os::IVold::STORAGE_FLAG_CE) {
             auto misc_ce_path = android::vold::BuildDataMiscCePath(user_id);