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: Ib61c3a25ae25c83707ef7126d1907c5931a7d762
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>