Refactor the DataUsageBase

1. Create a new DataUsageBaseFragment extending from DashboadFragment
2. Mark DataUsageBase as obsolete
3. Make DataUsageSummary use DataUsageBaseFragment
4. Deprecated DataPlanUsageSummary since it has been used nowhere.

Bug: 72497434
Test: robotest still pass
Change-Id: Ic67a3c90649ae84086dc60b1457566be8727c54b

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

@@ -36,6 +36,10 @@ import android.util.Log;
 import com.android.settings.SettingsPreferenceFragment;
 import com.android.settingslib.NetworkPolicyEditor;
 
+/**
+ * @deprecated please use {@link DataUsageBaseFragment} instead.
+ */
+@Deprecated
 public abstract class DataUsageBase extends SettingsPreferenceFragment {
     private static final String TAG = "DataUsageBase";
     private static final String ETHERNET = "ethernet";