Blind scan should be an optional feature based on the design document am: 58be11ec am: d9ae7bae

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



Change-Id: I3b45d0621819dc4ecc20d917b572666d11260225
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>