Correct labels on files / props in odm_dlkm.

All files under odm_dlkm are tagged vendor_file.
All build props for odm_dlkm are mapped as build_vendor_prop.

Test: build and
    `ls /odm_dlkm -lZ`
    `adb shell getprop -Z | grep odm_dlkm`

Bug: 154633114

Change-Id: Ifca69d0b7a8da945910a9cb0fa907735cd866f12
diff --git a/private/file_contexts b/private/file_contexts
index b8e02b4..a4d967e 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -465,6 +465,12 @@
 /(vendor_dlkm|vendor/vendor_dlkm|system/vendor/vendor_dlkm)(/.*)?         u:object_r:vendor_file:s0
 
 #############################
+# OdmDlkm files
+# This includes ODM Dynamically Loadable Kernel Modules and other misc files.
+#
+/(odm_dlkm|vendor/odm_dlkm|system/vendor/odm_dlkm)(/.*)?                  u:object_r:vendor_file:s0
+
+#############################
 # Vendor files from /(product|system/product)/vendor_overlay
 #
 # NOTE: For additional vendor file contexts for vendor overlay files,