Replace feature flag for N1 mode with IwlanCarrierConfig am: 834bb2d3c2

Original change: https://android-review.googlesource.com/c/platform/packages/services/Iwlan/+/2959266

Change-Id: I133a94f993a0317f4616c6f99329410222122002
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>