Revert "Revert "Audit hashCode overrides outside of packages/flutter (#85370)" (#85451)" (#85567)

This reverts commit 2be0d57fa25423ffcba5a07d22ef9386a89dcf4c.
diff --git a/dev/bots/analyze.dart b/dev/bots/analyze.dart
index 35865ea..dc98d75 100644
--- a/dev/bots/analyze.dart
+++ b/dev/bots/analyze.dart
@@ -610,7 +610,7 @@
   }
 
   @override
-  int get hashCode => a ^ b ^ c ^ d;
+  int get hashCode => Object.hash(a, b, c, d);
 }
 
 // DO NOT ADD ANY ENTRIES TO THIS LIST.