Merge "KeyMint VTS: cope with ATTEST_KEY +/- SIGN" am: 11cb564913 am: cbaede3f72 am: e9e12405f5 am: 6f0775a6ea

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2123433

Change-Id: I9b3ea8e0ead6a36a46c5200b9f808a93baa67f40
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>