fix: image occlusion cards couldn't be previewed in the note editor

the fields need to be passed for the card to be previewed, but they weren't built in IO so they couldn't have their values taken

AnkiDroid/src/main/java/com/ichi2/anki/NoteEditor.kt

@@ -1227,11 +1227,26 @@ class NoteEditor : AnkiActivity(), DeckSelectionListener, SubtitleListener, Tags
         // Send the previewer all our current editing information
         val noteEditorBundle = Bundle()
         addInstanceStateToBundle(noteEditorBundle)
-        noteEditorBundle.putBundle("editFields", fieldsAsBundleForPreview)
+        addFieldsToBundle(noteEditorBundle)
         previewer.putExtra("noteEditorBundle", noteEditorBundle)
         startActivity(previewer)
     }
 
+    @NeedsTest("IO fields are passed to the template previewer and the card can be previewed")
+    private fun addFieldsToBundle(bundle: Bundle) {
+        val fieldsBundle = if (currentNotetypeIsImageOcclusion()) {
+            val ioFieldsBundle = Bundle()
+            fieldsFromSelectedNote.forEachIndexed { index, field ->
+                val fieldValue = NoteService.convertToHtmlNewline(field[1], shouldReplaceNewlines())
+                ioFieldsBundle.putString(index.toString(), fieldValue)
+            }
+            ioFieldsBundle
+        } else {
+            fieldsAsBundleForPreview
+        }
+        bundle.putBundle("editFields", fieldsBundle)
+    }
+
     /**
      * finish when sd card is ejected
      */