Update sharedPreference to false when exits new device provisioning

Update sharedPreference to false when exits new device provisioning,
indicating no users modifications on the settings for new devices.
Thus carrier specific default roaming settings can be applied for new devices.

Bug: 122817867
Test: Manual test on VZW SIM in Setupwizard
Change-Id: Ic93b16f9f96ccc98d12f46c79ab1008ae0df8a07