1) alowFallback flag was incorrectly not reset while setting profile preference. Corrected it. 2) Threw exception if default preference and enterprise preference are set together 3) renamed clearUser to withoutUser Bug: 231670730 Test: ConnectivityServiceTest Change-Id: If92ebe0cc23f18c8808893926d5e1d12ff2e3650 Merged-In: Iaf49237bdc791c7e1dd884d069eff64e74757477