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

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



Change-Id: Idae0c0db7705d18b63c179f5ac977579f358b357
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>