"Voice id" and "voice name" are both used to reference a voice in a speech synthesis request. Voice id was a random integer, where voice name is human readable string, that provides more debug information and readability. Also, it's expected that voice name will stay consistent, and won't change during the life of the speech connection. Though, it may disappear. Change-Id: I180296d413a18301cead1c8e3212de2bd0c7e32d