Allow PO to call setSystemSetting.

As system setting is per user, we should allow PO to call it.

Bug: 77204777
Test: runtest -x services/tests/servicestests/src/
com/android/server/devicepolicy/DevicePolicyManagerTest.java

Change-Id: I84152fa04adb441955b48b676be6e792134b52c2
5 files changed