Fix a bug where the wrong profile is queried

UserManager#isManagedProfile() is not aware of the user
handle of the context the UM instance is created on.
Instead, call isManagedProfile(int).

Bug: 183625645
Test: ConnectivityServiceTest
Change-Id: I1fef22d67d75df25a8c2d0694f857c3e1c1a1306