Replace Context#sendStickyBroadcastAsUser()

ConnectivityService is using Context#sendStickyBroadcastAsUser
to send sticky broadcast but this API is not able to call after
it becomes part of Connectivity mainline module. Thus, replace it
with Context#sendStickyBroadcast.

Bug: 177223402
Test: atest FrameworksNetTests
Test: atest CtsNetTestCases
Test: atest CtsNetApi23TestCases
Change-Id: I55156aeaf9baa9f2fd41853375edf87994789b81