Prevent Traceur BootReceiver from starting Traceur on work profile

Utilizes the systemUserOnly property to ensure that only the primary
user on a phone will boot Traceur on receipt of a
BOOT_COMPLETED intent.

Bug: 136500409
Test: Booted phone with and without property set. Saw that two instances
of Traceur were running without, and only one instance with.

Change-Id: Ife5eea2296fe9bd79731f4e831de792b962be33b
1 file changed