Turn ENABLE_DEVICE_SEARCH to DeviceConfig flag am: f1bcf7a4dd am: ca2ba9e1c0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13419158

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I681444c2f304467656aa7ee25f90c0866d0662e2