tree 0f2007d576e9e11a2cbc95c61989a3de631333da
parent ea2f1e21eb4376f546c4d1662ae1ff53abb6820f
author Robert Ginda <rginda@google.com> 1440455246 -0700
committer Robert Ginda <rginda@google.com> 1440524267 -0700

Update service txt records when possible.

When possible, use the avahi UpdateServiceTxt api to update an existing
service rather than delete and re-create it.

Bug: 23495262
Test: Image dragonboard with these changes, provision the device,
  rename the device, verify that no new Avahi groups were created
  in the process and service txt record has actually been changed.

Change-Id: I36fdc3200eccabf134934a9962b61cca3b24a3c9