Merge "Refactor RouterAdvertisementDaemon to build new RA in HandlerThread" into main am: 29f70feb01

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2490882

Change-Id: I27f7b03209073ca266d15f3068830aa7eed6d18d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>