[Settings] Re-enable previous work on data saver

Previous work on data saver performance got disabled, this is a change to re-enable it.

Bug: 249502488
Test: build pass

Change-Id: I7264b1e8c21a789db358e0aae70a2cf0ce09ebba
(cherry picked from commit 2115d0e495)

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

@@ -78,11 +78,7 @@ public class DataSaverSummary extends SettingsPreferenceFragment
 
         addPreferencesFromResource(R.xml.data_saver);
         mUnrestrictedAccess = findPreference(KEY_UNRESTRICTED_ACCESS);
-        mApplicationsState = ApplicationsState.getInstance(
-                (Application) getContext().getApplicationContext());
         mDataSaverBackend = new DataSaverBackend(getContext());
-        mDataUsageBridge = new AppStateDataUsageBridge(mApplicationsState, this, mDataSaverBackend);
-        mSession = mApplicationsState.newSession(this, getSettingsLifecycle());
     }
 
     @Override