Bug 1095219 - Fix failing smart-home-test/unit/card_manager_test.js and re-enable it



https://bugzilla.mozilla.org/show_bug.cgi?id=1095219
I know what the problem is now. I made a TV build and ran it locally only for smart-home app.

But on Gaia-Try or taskcluster, test-agent will scan through all folder under profile. So all unit test in tv_apps will run even with phone build, as Ricky said in https://bugzilla.mozilla.org/show_bug.cgi?id=1095219#c8
 

This test will definitely fail in phone build. So I think we should disable it by not letting test-agent scan it.