Merge "ipv4 tethering offload - decrement ttl during forwarding" am: f21f5357e7 am: f54ce8312b am: 212fa79a4b

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

Change-Id: Ib34a1b900ea90fc7cc166cd34b72058b40f059a7