Migrate PostUploadNotifier to use EditorLauncher for notification post creation

Replace direct EditPostActivity Intent creation with EditorLauncher for the "Write Post"
action that appears in upload completion notifications.

Changes:
- Use EditorLauncher.getInstance().createEditorIntent() for notification write post action
- Pass insertMedia parameter with uploaded media files
- Preserve isPage(false) for new post creation
- Maintain existing Intent flags and notification action setup

This ensures consistent editor routing and analytics tracking for posts created
from upload notifications while preserving the original media insertion behavior.

Author: oguzkocer

WordPress/src/main/java/org/wordpress/android/ui/uploads/PostUploadNotifier.java

@@ -27,8 +27,9 @@
 import org.wordpress.android.ui.media.MediaBrowserActivity;
 import org.wordpress.android.ui.notifications.SystemNotificationsTracker;
 import org.wordpress.android.ui.pages.PagesActivity;
-import org.wordpress.android.ui.posts.EditPostActivity;
 import org.wordpress.android.ui.posts.EditPostActivityConstants;
+import org.wordpress.android.ui.posts.EditorLauncher;
+import org.wordpress.android.ui.posts.EditorLauncherParams;
 import org.wordpress.android.ui.posts.PostUtils;
 import org.wordpress.android.ui.posts.PostsListActivity;
 import org.wordpress.android.ui.posts.PostsListActivityKt;
@@ -441,12 +442,15 @@ void updateNotificationSuccessForMedia(@NonNull List<MediaModel> mediaList, @Non
         if (mediaList != null && !mediaList.isEmpty()) {
             ArrayList<MediaModel> mediaToIncludeInPost = new ArrayList<>(mediaList);
 
-            Intent writePostIntent = new Intent(mContext, EditPostActivity.class);
+            EditorLauncherParams params = EditorLauncherParams.Builder
+                    .forSite(site)
+                    .isPage(false)
+                    .insertMedia(mediaToIncludeInPost)
+                    .build();
+
+            Intent writePostIntent = EditorLauncher.getInstance().createEditorIntent(mContext, params);
             writePostIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
             writePostIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-            writePostIntent.putExtra(WordPress.SITE, site);
-            writePostIntent.putExtra(EditPostActivityConstants.EXTRA_IS_PAGE, false);
-            writePostIntent.putExtra(EditPostActivityConstants.EXTRA_INSERT_MEDIA, mediaToIncludeInPost);
             writePostIntent.setAction(String.valueOf(notificationId));
 
             PendingIntent actionPendingIntent =