Blind scan should be an optional feature based on the design document am: 58be11ecc4 am: d9ae7baed7

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2890674

Change-Id: I5b38aface4a1fea89bf0d3d6b28cf6eef93a28c9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>