Add push mechanism in DPM for ConnecitivityService
Remove DPM.isNetworkSlicingEnabledForUser

Test: Unit test added but commented; atest DevicePolicyManagerTest
Bug: 178655595
Change-Id: I77d1996f33b017221a14799e71f2df2123f99b32
Merged-In: I77d1996f33b017221a14799e71f2df2123f99b32
7 files changed