Merge "Cleanup IpReachabilityMonitor" into tm-dev am: 4458acb888 am: 86afbf1099

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/18335861

Change-Id: I5b7275a990d1c6dbe3b3bf669cb3755b5155baaf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>