am 8a8b9190: am 9a91ae80: am 157e631b: am 42f5cb37: Only mark as read voicemails with the "is_read" flag set.

* commit '8a8b9190ef0693c93ee1ea73aef398d3cc411c87':
  Only mark as read voicemails with the "is_read" flag set.