android, desktop: creating wallpapers dir in some situations (#4254)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/database/DatabaseView.kt

@@ -537,6 +537,7 @@ suspend fun exportChatArchive(
   if (!m.chatDbChanged.value) {
     controller.apiSaveAppSettings(AppSettings.current.prepareForExport())
   }
+  wallpapersDir.mkdirs()
   m.controller.apiExportArchive(config)
   if (storagePath == null) {
     deleteOldArchive(m)
@@ -592,6 +593,7 @@ private fun importArchive(
     withLongRunningApi {
       try {
         m.controller.apiDeleteStorage()
+        wallpapersDir.mkdirs()
         try {
           val config = ArchiveConfig(archivePath, parentTempDirectory = databaseExportDir.toString())
           val archiveErrors = m.controller.apiImportArchive(config)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/migration/MigrateToDevice.kt

@@ -594,6 +594,7 @@ private fun MutableState<MigrationToState?>.importArchive(archivePath: String, n
         chatInitControllerRemovingDatabases()
       }
       controller.apiDeleteStorage()
+      wallpapersDir.mkdirs()
       try {
         val config = ArchiveConfig(archivePath, parentTempDirectory = databaseExportDir.toString())
         val archiveErrors = controller.apiImportArchive(config)