randomized clat dad nonce, send only one copy am: a1cb0f30de am: 5149c20556 am: 889a3b57ca

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/2161296

Change-Id: Ieb7a2767872632e3cd108bdace9d955fd57c0041
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>