/usr/share/dbus-1/services/com.canonical.pim.updater.service is in address-book-updater 0.1.1+16.04.20151211.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=com.canonical.pim.updater
Exec=/usr/lib/x86_64-linux-gnu/address-book-service/address-book-updater
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