Merge "Add public getter for IpPrefix" into main am: 149868f1b1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2802926

Change-Id: Iccf6f1957feb577113e8d3260447e5c295561a3e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>