[CS04]Remove hidden API usage of NetworkCapabilities

The connection service will become the mainline module. The mutating
NetworkCapabilities is deprecated, and the NetworkCapabilities should
be built through their Builder instead.

Bug: 170598012
Test: atest FrameworksMockingServicesTests:ConnectivityControllerTest
Test: atest CtsJobSchedulerTestCases
Change-Id: I931f6f4cedd89a3ff7c811266c68c00f26e8ce43