Re-restrict phone ops on user addition

When a user is added, the phone ops need to be re-restricted since
otherwise the new user will not have the restrictions until the device
is rebooted.

Bug: 224603811
Test: manual, atest AppOpsTest#ensurePhoneCallOpsRestricted
Change-Id: I0af951965a7afa8aa5295b7a99415bff002da544