$ sudo apt-get update
$ sudo apt-get install libdeclarative-contacts 

libdeclarative-contacts is installed in your system.

Make ensure the libdeclarative-contacts package were installed using the commands given below,

$ sudo dpkg-query -l | grep libdeclarative-contacts *

You will get with libdeclarative-contacts package name, version, architecture and description in a table

libdeclarative-contacts package basic information: