1. Use AndroidJunit4 instead of RobolectricTestRunner
2. Use ApplicationProvider instead of RuntimeEnvironment to get context
Bug: 162048313
Test: atest -c MobileDataEnabledListenerTest
Merged-In: I81b3d6ac075666a45649c8d811832a40bdb1b41b
Change-Id: I34687eb69ef62cd3b6ea6519cee608a7b95f242b