Label /proc/sys/kernel/sched_schedstats.

This allows init to write to it, which it does for atrace.

Bug: 72643420
Test: Boot two devices, observe no denials, test atrace.
Change-Id: I6810e5dcdfaff176bd944317e66d4fe612ccebed
(cherry picked from commit dce07413bc7380c45c85b26c71afe14849a96fae)
1 file changed