Revert changes for disallowing user to run in background for now.

Will schedule a design review to go over the problem and discuss
options.

Test: build
Bug: 123998239
Change-Id: I670808694565ba1220f6a6cc383478a4dc88acda
(cherry picked from commit 60e4d26a2db4b40e398eac5474542541f2587422)
1 file changed