[Testing] Use AndroidJUnit4 instead in DataConnectivityListenerTest

1. Use AndroidJunit4 instead of RobolectricTestRunner
2. Use ApplicationProvider instead of RuntimeEnvironment to get context

Bug: 162048313
Test: atest -c DataConnectivityListenerTest
Change-Id: I8f05ac7f5f14cb2b990da137099a22e4a89fcc37
1 file changed