Call onViewCreated in DashboardFragment

To let fragment's view lifecycle owner passed in to controllers.

For UI usage, view lifecycle owner is the best choice, controller could
use this lifecycle owner to observe events and do UI related works.

Usage DataSaverController as first example.

Bug: 287005021
Test: Manually for DataSaverController
Change-Id: Id965ea3a24d61f4d0ec6735632944f41f72ba06a

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

@@ -19,11 +19,9 @@ import android.app.settings.SettingsEnums
 import android.content.Context
 import android.os.Bundle
 import android.telephony.SubscriptionManager
-import android.view.View
 import android.widget.Switch
 import com.android.settings.R
 import com.android.settings.SettingsActivity
-import com.android.settings.applications.specialaccess.DataSaverController
 import com.android.settings.dashboard.DashboardFragment
 import com.android.settings.search.BaseSearchIndexProvider
 import com.android.settings.widget.SettingsMainSwitchBar
@@ -59,11 +57,6 @@ class DataSaverSummary : DashboardFragment() {
         }
     }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-        use(DataSaverController::class.java).init(viewLifecycleOwner)
-    }
-
     override fun onResume() {
         super.onResume()
         dataSaverBackend.addListener(dataSaverBackendListener)