Add check_feature helper Test: VtsAidlKeyMintTargetTest Change-Id: I4a5b2a41172c15ae29efb5b177eb86cea5527b4e Merged-In: I4a5b2a41172c15ae29efb5b177eb86cea5527b4e (cherry picked from commit 3d2ba0a137debcbf48a4efdd2016fe132293b6bc)