The admin can instead use the value of 0 to reset to default. Test: runtest --path frameworks/base/services/tests/servicestests/src/com/android/server/devicepolicy/DevicePolicyManagerTest.java Bug: 31430135 Change-Id: I0d6b29ca4eca65d7ca72a8975a0c28c9050a946c (cherry picked from commit 943aabd11cce3ab453762d3912395363720e1f5d)