Update 1: 2015/12/02 12:29pm PST
It appears that, for whatever reason, Google has pulled the Phone and Contacts apps from the Play Store shortly after publishing them. We do not know why. We'll update this
Update 2: 2015/12/07 4:45pm PST
Both apps have been republished on the Play Store, so you should be able to get them from the links below now.
Update 3: 2015/12/08 9:43am PST
The apps have been pulled off the Play Store by Google...