Merge changes I47606693,Ia51bc3ab,Idef1a6d1,Ie6fbc3ee,I55064ee7 into main

* changes:
  Clean up BpfCoordinatorTest after refactors
  Move upstream interface BPF support check to BpfCoordinator
  Refactor BPF map update logic of upstream interface change
  Centralize IP neighbor monitoring in BpfCoordinator
  Get rid of BpfCoordinator#mPollingStarted