Messaging: Convert further parts to androidx

CursorLoader, LoaderManager, Preferences, Fragments, ...

Change-Id: I8787b2db365249839547c6d5c21ab7cd5ff42082

src/com/android/messaging/ui/conversationsettings/PeopleAndOptionsFragment.java

@@ -18,7 +18,6 @@ package com.android.messaging.ui.conversationsettings;
 
 import android.app.Activity;
 import android.app.AlertDialog;
-import android.app.Fragment;
 import android.app.NotificationManager;
 import android.content.Context;
 import android.content.Intent;
@@ -36,6 +35,8 @@ import android.widget.ListView;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.loader.app.LoaderManager;
 
 import com.android.messaging.R;
 import com.android.messaging.datamodel.DataModel;
@@ -72,7 +73,7 @@ public class PeopleAndOptionsFragment extends Fragment
     @Override
     public void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        mBinding.getData().init(getLoaderManager(), mBinding);
+        mBinding.getData().init(LoaderManager.getInstance(this), mBinding);
     }
 
     @Override