Add length option into ICMP packets am: cc32c80293 am: a12be70e5d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/22963271

Change-Id: Ibfa06d57623e9e108863f4e94898280b4e4d1fc4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>