Created a new controller for DataUsageInfo and add appropriate unit tests. Bug: 30946416 Change-Id: Ida1281a771013fd807242f846edb4f2a9c0ccabb Test: Robolectric tests with target RunSettingsRoboTests
Bug: 30918570 Change-Id: I4ae998676757b4985833fac5ba05d7685e29a8a8