Add toString for DnsTlsServer am: bf52841c am: ea22a41b am: 3726e9bc am:...

Add toString for DnsTlsServer am: bf52841c am: ea22a41b am: 3726e9bc am: f7144d5b am: df7698f1 am: ed1a9d32 am: 78e9c056 am: b8fbc04d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2651940



Change-Id: I440f56b5820610f129bf3d9fe1f6e53c5cc77aed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>