Merge "Add util method to generate IPv4-mapped IPv6 address from IPv4 address" into main am: cb62c1b120

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2795709

Change-Id: I22c7b31586191ae78252bd69c9a5f92e0b7d8ec5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>