- Refactor code to use idiomatic Kotlin functions like isNullOrEmpty(), associateBy, and appendRange

- Increase `DiffUtil` threshold in `CursorRecyclerAdapter` to 500 and optimize equality checks
- Simplify locale configuration by removing legacy Android SDK version checks
- Remove unnecessary `@SuppressLint` annotations and `@Volatile` modifiers
- Improve performance of collection operations in `ProductFragment` and `Preferences` using `associateBy` and `firstOrNull`
- Suppress deprecation warnings for `getOpacity` in `DrawableWrapper` and `TabsFragment`
- Clean up service binding logic in `Connection.kt` with better type casting

src/main/kotlin/com/michatec/store/service/SyncService.kt

@@ -331,7 +331,7 @@ class SyncService: ConnectionService<SyncService.Binder>() {
               currentTask = null
               handleNextTask(false)
               val blocked = updateNotificationBlockerFragment?.get()?.isAdded == true
-              if (!blocked && result != null && result.isNotEmpty()) {
+              if (!blocked && !result.isNullOrEmpty()) {
                 displayUpdatesNotification(result)
               }
             }