[Bug] Made updates related to targetSdk update for media.

I omitted the targetSdk update in this PR simply to allow testing
with the previous version to ensure everything remains the same.

Additionally, I added the foreground service types related to images.

Author: Andy Valdez

WordPress/src/main/AndroidManifest.xml

@@ -28,6 +28,7 @@
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
     <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
     <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
 
     <!-- GCM all build types configuration -->
     <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
@@ -823,11 +824,13 @@
         <!-- Services -->
         <service
             android:name=".ui.uploads.UploadService"
-            android:label="Upload Service" />
+            android:label="Upload Service"
+            android:foregroundServiceType="dataSync"/>
         <service
             android:name=".ui.media.services.MediaDeleteService"
             android:label="Media Delete Service"
             android:exported="false"
+            android:foregroundServiceType="dataSync"
             />
 
         <service
@@ -1048,7 +1051,7 @@
 
         <service
             android:name=".push.GCMMessageService"
-            android:exported="false">
+            android:exported="false" >
             <intent-filter>
                 <action android:name="com.google.firebase.MESSAGING_EVENT" />
             </intent-filter>

WordPress/src/main/java/org/wordpress/android/ui/media/MediaSettingsActivity.java

@@ -9,13 +9,15 @@
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
+import android.content.ContextWrapper;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Build;
+import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
@@ -467,7 +469,11 @@ protected void onSaveInstanceState(@NonNull Bundle outState) {
     @SuppressLint("UnspecifiedRegisterReceiverFlag")
     public void onStart() {
         super.onStart();
-        registerReceiver(mDownloadReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
+        if (Build.VERSION.SDK_INT >= VERSION_CODES.UPSIDE_DOWN_CAKE) {
+            registerReceiver(mDownloadReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE), ContextWrapper.RECEIVER_NOT_EXPORTED);
+        } else {
+            registerReceiver(mDownloadReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
+        }
         mDispatcher.register(this);
 
         // we only register with EventBus the first time - necessary since we don't unregister in onStop()

WordPress/src/main/java/org/wordpress/android/ui/mediapicker/loader/DeviceListBuilder.kt

@@ -69,7 +69,7 @@ class DeviceListBuilder(
             // This item sets the threshold for the visible items in all the list
             val lastShownTimestamp = results.fold(0L) { timestamp, (_, result) ->
                 val nextTimestamp = result?.nextTimestamp
-                if (nextTimestamp != null && nextTimestamp > timestamp) {
+                if (result?.items?.isNotEmpty() == true && nextTimestamp != null && nextTimestamp > timestamp) {
                     nextTimestamp
                 } else {
                     timestamp