Migrate to use instrumentation classes from settingslib.

Test: Compiles. Manually tested.
Change-Id: Ie5515bb0fe3e621fc7723a9b04ba23e4bfa9c401

tests/robotests/src/com/android/settings/datausage/DataUsageListTest.java

@@ -60,6 +60,7 @@ public class DataUsageListTest {
 
     @Test
     public void resumePause_shouldListenUnlistenDataStateChange() {
+        mDataUsageList.onAttach(mContext);
         mDataUsageList.onResume();
 
         verify(mListener).setListener(true, 0, mContext);