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: I5e57019d1f5e2eaa06fcf6463582c34bee78a09a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>