Check if folder exists before letting the user import/export saves

src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/ImportExportSavesFragment.kt

@@ -66,7 +66,14 @@ class ImportExportSavesFragment : DialogFragment() {
     }
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        return MaterialAlertDialogBuilder(requireContext())
+        return if (savesFolderRoot == "") {
+            MaterialAlertDialogBuilder(requireContext())
+                .setTitle(R.string.import_export_saves)
+                .setMessage("No profileID found. Launch a game first and then come back.")
+                .setPositiveButton(android.R.string.ok, null)
+                .show()
+        } else {
+            MaterialAlertDialogBuilder(requireContext())
                 .setTitle("Import/Export Saves")
                 .setPositiveButton("Export") { _, _ ->
                     exportSave()
@@ -76,6 +83,7 @@ class ImportExportSavesFragment : DialogFragment() {
                 }
                 .show()
         }
+    }
 
     /**
      * Zips the save files located in the given folder path and creates a new zip file with the current date and time.