Add test for DevicePolicyManager.acknowledgeNewUserDisclaimer()

Test: atest com.android.cts.devicepolicy.DeviceOwnerTest#testCreateAndManageUser_newUserDisclaimer
Fixes: 203822627
Bug: 215375992

Change-Id: I8b98a1af60db65c1b27f19cf3e93b21d33d88278
Merged-In: I8b98a1af60db65c1b27f19cf3e93b21d33d88278
(cherry picked from commit 47f80270d2d4ffc760fc887e21659ba70153b962)
4 files changed