- 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/graphics/DrawableWrapper.kt

@@ -74,5 +74,6 @@ open class DrawableWrapper(val drawable: Drawable): Drawable() {
     DrawableCompat.setHotspotBounds(drawable, left, top, right, bottom)
   }
 
+  @Suppress("DEPRECATION", "OVERRIDE_DEPRECATION")
   override fun getOpacity(): Int = drawable.opacity
 }