p2p: avoid adding duplicate channel lists am: 245a5fad4f

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/wpa_supplicant_8/+/19204144

Change-Id: Ibdea9f25c9ceb47482512d63c3ab728e5e0f68ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>