Merge "ipv4 tethering offload - decrement ttl during forwarding" am: f21f5357e7 am: f54ce8312b

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1755049

Change-Id: Idb6f95c96fa7832f4482fb6fc0237bb242ca8794