Merge "Delete NsdChat sample" into main am: 72ff9e98f0

Original change: https://android-review.googlesource.com/c/platform/development/+/3102698

Change-Id: I3bc5d7510b4796bd2a1442d665229f135b1171b9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>