Remove ENABLE_ONE_SEARCH

TL;DR;;
It's no longer bound to the lifecycle of application

Bug: 223750757
Bug: 221956299

Test: device_config commands

Signed-off-by: Hyunyoung Song <hyunyoungs@google.com>
Change-Id: I044bf00fe7272439d2ed4def419f91b4d786fb7a