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

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

Change-Id: I54aacee79aaf0614f42a762a7019d9ce7761e1bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>