[automerger skipped] Clean up DnsTlsDispatcher when a network is disconnected...

[automerger skipped] Clean up DnsTlsDispatcher when a network is disconnected am: b46f8fae -s ours am: 745fa777 -s ours am: 05ab6118 -s ours

am skip reason: Merged-In I3bf3b7ddec7818c4fcf3ffaa0f97173d876d3642 with SHA-1 b46f8fae is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/14997551

Change-Id: I1696e65b41db74d8859ec2d4d07f2b04d18e4cee