Switch file context of odm(/.*) to vendor_file

/odm partition is the extension of /vendor partition, so we should not
use system_file for it. Currently there is no ABI between vendor and
odm. We can use 'odm_file' when needed in the future.

Bug: 64240127
Test: boot a device
Change-Id: I4e8300d597aeeba60a255c8d114a54b24bc39470

private/file_contexts

@@ -314,7 +314,7 @@
 #############################
 # OEM and ODM files
 #
-/odm(/.*)?              u:object_r:system_file:s0
+/odm(/.*)?              u:object_r:vendor_file:s0
 /oem(/.*)?              u:object_r:oemfs:s0