Messaging: Convert further parts to androidx

CursorLoader, LoaderManager, Preferences, Fragments, ...

Change-Id: I8787b2db365249839547c6d5c21ab7cd5ff42082

src/com/android/messaging/ui/mediapicker/DocumentImagePicker.java

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2015 The Android Open Source Project
+ * Copyright (C) 2024 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,11 +16,12 @@
  */
 package com.android.messaging.ui.mediapicker;
 
-import android.app.Fragment;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
 
+import androidx.fragment.app.Fragment;
+
 import com.android.messaging.Factory;
 import com.android.messaging.datamodel.data.PendingAttachmentData;
 import com.android.messaging.ui.UIIntents;