Use BOARD_USES_VENDORIMAGE to detect vendor image presence - DO NOT MERGE am: 1536654205 am: a1e35a5fb4 am: 72b39acd97  -s ours
am: 843bdaf7d0  -s ours

Change-Id: Ie18f6ed7ba802c9a5d1b7d1dacdf78df858bae31