== override parameters are non-nullable (#117839)

packages/flutter/lib/src/material/about.dart

@@ -756,7 +756,7 @@ class _DetailArguments {
   final List<LicenseEntry> licenseEntries;
 
   @override
-  bool operator ==(final dynamic other) {
+  bool operator ==(final Object other) {
     if (other is _DetailArguments) {
       return other.packageName == packageName;
     }

packages/flutter/test/rendering/mouse_tracker_cursor_test.dart

@@ -462,7 +462,7 @@ class _CursorUpdateDetails extends MethodCall {
   Map<String, dynamic> get arguments => super.arguments as Map<String, dynamic>;
 
   @override
-  bool operator ==(dynamic other) {
+  bool operator ==(Object other) {
     if (identical(other, this)) {
       return true;
     }