clatd: fix endianness of multicast drop am: 30020a513a

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3555171

Change-Id: Ic1b1f0ffcf531deb67ff8506da0a76e7a1a36a12
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>