Replace setAutoTimeRequired and getAutoTimeRequired with setAutoTime and getAutoTime

* Deprecate setAutoTimeRequired and getAutoTimeRequired.
* Added new API methods setAutoTime and getAutoTime.
* These new APIS use the DISALLOW_CONFIG_DATE_TIME user restriction to prevent the user from setting auto time.
* Updated Settings AutoTimePreferenceController to look at the DISALLOW_CONFIG_DATE_TIME restriction

Bug: 138709470
Test: Manual testing with testdpc and the set auto time toggle
      DevicePolicyManagerTest
      DeviceAndProfileOwnerTest
      DevicePolicyLoggingTest
      AutoTimePreferenceControllerTest

Change-Id: I55b44840089a0b701ca4d5572a0e91deb40152ed