⚡️ Add dispose method the AssetPicker

Author: AlexV525

lib/src/delegates/asset_picker_builder_delegate.dart

@@ -163,6 +163,15 @@ abstract class AssetPickerBuilderDelegate<A, P> {
   /// 当前的权限是否为受限
   bool get isPermissionLimited => permission.value == PermissionState.limited;
 
+  /// Keep a dispose method to sync with [State].
+  /// 保留一个 dispose 方法与 [State] 同步。
+  void dispose() {
+    provider.dispose();
+    gridScrollController.dispose();
+    permission.dispose();
+    permissionOverlayHidden.dispose();
+  }
+
   /// Path entity select widget builder.
   /// 路径选择部件构建
   Widget pathEntitySelector(BuildContext context);

lib/src/delegates/asset_picker_viewer_builder_delegate.dart

@@ -107,6 +107,7 @@ abstract class AssetPickerViewerBuilderDelegate<A, P> {
   /// Keep a dispose method to sync with [State].
   /// 保留一个 dispose 方法与 [State] 同步。
   void dispose() {
+    provider?.dispose();
     pageStreamController.close();
     previewingListController.dispose();
     selectedNotifier.dispose();

lib/src/widget/asset_picker.dart

@@ -256,6 +256,7 @@ class AssetPickerState<A, P> extends State<AssetPicker<A, P>>
   @override
   void dispose() {
     WidgetsBinding.instance!.removeObserver(this);
+    widget.builder.dispose();
     super.dispose();
   }