Blind scan should be an optional feature based on the design document am: 58be11ecc4 am: d9ae7baed7 am: 455a392349

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

Change-Id: I9dcabe4d3de6c1946a788362839e97245a1fba7f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>