Merge "Guard NPE when fetching a voicemail that does not exist on the server" into nyc-dev am: 430ac14
am: 7b36bcd

* commit '7b36bcd6276fb52455c513c6a7c1125ddecbe248':
  Guard NPE when fetching a voicemail that does not exist on the server

Change-Id: Ib90c40dad0f38cd6196538508692d9ca598a0479