Merge "Add toString() to Ipv6ForwardingRule" am: df46aeb098

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2240398

Change-Id: Ic6d64c24b371f2346341c946a7140aabec42e823
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>