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: Id30bb8ab005bf491cba28ca09cf50ce4350af817
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>