[automerger skipped] Add attestation certificate parsing and validate for IC vts. am: 57b3479394 -s ours

am skip reason: Change-Id Ibe770e6eaf0b0018d60876926d824204e4eaf732 with SHA-1 cab019aae5 is in history

Change-Id: Icda771e7c01bd1bc2543ffb7e03ac76aaaa9f78f