Actually use --copy-and-update-profile-key argument in profman...

The argument was not parsed and thus always false. This went under the
radar because the tests were verifying the profile assistant code
directly, bypassing profman cmd line invocation.

Test: profile_assistant_test
Bug: 30934496
Change-Id: I8f0b4f63759db39a6948d92a701b0e2794f253b1