Test that vendor AID names begin with vendor_

Now that we're only processing vendor AID names that begin with
vendor_, add an explicit test to fail devices that use AID names
without this prefix.

Bug: 79528966
Test: Pass if no vendor defined AIDs are present
Test: Pass if vendor defined AIDs are present with vendor_ prefix
Test: Fail if vendor defined AIDs are present without vendor_ prefix

Change-Id: I77c559800b4904f58c49fbe339e4daad7d953089