Merge "Only renew/rebind valid prefixes at ReacquireState." into main am: d2888426b2 am: b1136e5f3d am: 41e0a6f652

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2846094

Change-Id: I66dcb0ea1e2a9b8989c8f370b8e6e83ae54715d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>