/odm is another vendor partition other than /vendor

Sub directories under /odm (or /vendor/odm when there isn't an odm
partition) are labeled so that artifacts under the sub directories are
treated the same as their counterpart in the vendor partition.

For example, /odm/app/* is labeled as vendor_app_file just like
/vendor/app/*.

Bug: 71366495
Test: m -j

Merged-In: I72a14fd55672cd2867edd88ced9828ea49726694
Change-Id: I72a14fd55672cd2867edd88ced9828ea49726694
(cherry picked from commit 2f101551)