Disable background restricted profiles on all TVs

Devices can override this to get background restricted profiles back
in case the advantages of keeping a user sitting in memory are worth it
(these benefits being 2s faster switch time and higher chance of
returning to the same place in restricted apps).

Bug: 71626497
Test: to follow in //platform/vendor/xts/3491171
Change-Id: I896e5d5942c518a15db0bf4579ba9e2f0461953b