Create changelog entry for flutter 3.35.7 (flutter#177334)

Changelog entry onlyl

Author: reidbaker

CHANGELOG.md

@@ -32,6 +32,11 @@ docs/releases/Hotfix-Documentation-Best-Practices.md
 
 ## Flutter 3.35 Changes
 
+### [3.35.7](https://github.com/flutter/flutter/releases/tag/3.35.7)
+
+[flutter/174082](https://github.com/flutter/flutter/issues/174082) Apps, on all platforms, that extend MenuController class see a compile time failure when building.
+[flutter/173770](https://github.com/flutter/flutter/issues/173770) Mitigates a memory leak that occurs on Android, when `Activities` are not kept upon exit and an Activity is exited and re-entered.
+
 ### [3.35.6](https://github.com/flutter/flutter/releases/tag/3.35.6)
 
 - [flutter/175669](https://github.com/flutter/flutter/issues/175669) `flutter analyze --suggestions` supports versions up to Java 25, Gradle 9 and AGP 9, Kotlin 2.2.20.