allow vold_prepare_subdirs to create storaged directories

Test: Boot device, observe logs
Bug: 63740245
Change-Id: I1068304b12ea90736b7927b7368ba1a213d2fbae

private/file_contexts

@@ -396,6 +396,7 @@
 /data/misc/profman(/.*)?        u:object_r:profman_dump_data_file:s0
 
 # storaged proto files
+/data/misc_de/[0-9]+/storaged(/.*)?       u:object_r:storaged_data_file:s0
 /data/misc_ce/[0-9]+/storaged(/.*)?       u:object_r:storaged_data_file:s0
 
 # Fingerprint data

private/vold_prepare_subdirs.te

 domain_auto_trans(vold, vold_prepare_subdirs_exec, vold_prepare_subdirs)
+
+allow vold_prepare_subdirs storaged_data_file:dir create_dir_perms;