Do not show "Cancel setup" button for Work Profile

Do not show the "Cancel setup" button for provisioning of a work
profile, since it provides the user with the option of factory resetting
the device, which is not the right way to abort Work Profile set-up.

Test: Manual, installed TestDPC and created a work profile, observed
button not showing.
Bug: 182885286

Change-Id: I0970189c140254d9d7ba4470a3f061635b6d4c4c
1 file changed