New DataUsageListHeaderController

Move spinner and config button to DataUsageListHeaderController.

Bug: 290856342
Test: manual - on DataUsageList and AppDataUsage
Test: unit test
Change-Id: I655bd3441b2305708c0052f1203538bb07eef2af

src/com/android/settings/datausage/ChartDataUsagePreference.java

@@ -294,14 +294,6 @@ public class ChartDataUsagePreference extends Preference {
         notifyChanged();
     }
 
-    public long getInspectStart() {
-        return mStart;
-    }
-
-    public long getInspectEnd() {
-        return mEnd;
-    }
-
     public void setNetworkCycleData(NetworkCycleChartData data) {
         mNetworkCycleChartData = data;
         mStart = data.getStartTime();