refactor: prevent app from crashing for SDKs >= 34

app/src/main/java/fr/free/nrw/commons/customselector/ui/adapter/FolderAdapter.kt

@@ -62,13 +62,15 @@ class FolderAdapter(
         folder.images.removeAll(toBeRemoved)
         val count = folder.images.size
 
-        if(count == 0) {
+        if(count == 0 && folders.size > 0) {
             // Folder is empty, remove folder from the adapter.
             holder.itemView.post{
                 val updatePosition = folders.indexOf(folder)
-                folders.removeAt(updatePosition)
-                notifyItemRemoved(updatePosition)
-                notifyItemRangeChanged(updatePosition, folders.size)
+                if(updatePosition != -1) {
+                    folders.removeAt(updatePosition)
+                    notifyItemRemoved(updatePosition)
+                    notifyItemRangeChanged(updatePosition, folders.size)
+                }
             }
         } else {
             val previewImage = folder.images[0]

app/src/main/java/fr/free/nrw/commons/customselector/ui/adapter/ImageAdapter.kt

@@ -122,7 +122,7 @@ class ImageAdapter(
      * Bind View holder, load image, selected view, click listeners.
      */
     override fun onBindViewHolder(holder: ImageViewHolder, position: Int) {
-
+        if(images.size == 0) { return }
         var image=images[position]
         holder.image.setImageDrawable (null)
         if (context.contentResolver.getType(image.uri) == null) {

app/src/main/java/fr/free/nrw/commons/customselector/ui/selector/FolderFragment.kt

@@ -116,11 +116,14 @@ class FolderFragment : CommonsDaggerSupportFragment() {
     private fun handleResult(result: Result) {
         if(result.status is CallbackStatus.SUCCESS){
             val images = result.images
-            if(images.isNullOrEmpty())
-            {
+            if(images.isEmpty()){
                 binding?.emptyText?.let {
                     it.visibility = View.VISIBLE
                 }
+            } else {
+                binding?.emptyText?.let {
+                    it.visibility = View.GONE
+                }
             }
             folders = ImageHelper.folderListFromImages(result.images)
             folderAdapter.init(folders)

app/src/main/java/fr/free/nrw/commons/customselector/ui/selector/ImageFragment.kt

@@ -39,6 +39,7 @@ import fr.free.nrw.commons.upload.FileUtilsWrapper
 import io.reactivex.schedulers.Schedulers
 import java.util.*
 import javax.inject.Inject
+import kotlin.collections.ArrayList
 
 /**
  * Custom Selector Image Fragment.
@@ -279,6 +280,8 @@ class ImageFragment : CommonsDaggerSupportFragment(), RefreshUIListener, PassDat
                     }
                 }
             } else {
+                filteredImages = ArrayList()
+                allImages = filteredImages
                 binding?.emptyText?.let {
                     it.visibility = View.VISIBLE
                 }
@@ -324,7 +327,7 @@ class ImageFragment : CommonsDaggerSupportFragment(), RefreshUIListener, PassDat
             .findFirstVisibleItemPosition()
 
         // Check for empty RecyclerView.
-        if (position != -1) {
+        if (position != -1 && filteredImages.size > 0) {
             context?.let { context ->
                 context.getSharedPreferences(
                     "CustomSelector",