[automerger skipped] Add attestation certificate parsing and validate for IC vts. am: 57b3479394 am: e7aa4b92c5 am: 818ad77686 -s ours

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

Change-Id: I40bb9afab2367b6bc724e2210613f7a7a6f51f2e