[3.2] Update breaking changes page (#5331)

- Moved "not yet released to stable" contents to "released in 3.2"
section, and added newer entries from the changelog.
- Added 3.3.0 changelog contents to "not yet released in stable"

---------

Co-authored-by: Parker Lougheed <parlough@gmail.com>

Author: MaryaBelanger

src/resources/breaking-changes.md

@@ -47,6 +47,45 @@ To be notified about future breaking changes, join the [Dart announce][] group.
 
 ## Not yet released to stable
 
+### Libraries
+{: .no_toc}
+
+#### `dart:nativewrappers`
+
+* [Marked classes belonging to `NativeWrapperClass` as `base`][51896] so that
+  none of their subtypes can be implemented.
+
+#### `dart:typed_data`
+
+* **Deprecated**: [Unmodifiable view classes for typed data][53218].
+
+
+[51896]: https://github.com/dart-lang/sdk/issues/51896
+[53218]: https://github.com/dart-lang/sdk/issues/53218
+
+{% comment %}
+Create new section from these headers for each release.
+If no changes exist in a section (e.g. Language, `dart:async`, etc.),
+don't include the section header.
+
+## Released in x.x.x
+
+### Language
+{: .no_toc}
+
+### Libraries
+{: .no_toc}
+
+#### (`dart:core`, `package:js`, etc)
+
+### Tools
+{: .no_toc}
+
+#### (Dart VM, Pub, Linter, `dart2js`, etc)
+{% endcomment %}
+
+## Released in 3.2.0
+
 ### Language
 {: .no_toc}
 
@@ -57,6 +96,10 @@ To be notified about future breaking changes, join the [Dart announce][] group.
 ### Libraries
 {: .no_toc}
 
+#### `dart:cli`
+
+* **Experimental** **Deprecated**: [The `waitFor` function.][52121]
+
 #### `dart:convert`
 
 * [Changed return types of `utf8.encode()` and `Utf8Codec.encode()`][52801]
@@ -66,52 +109,80 @@ To be notified about future breaking changes, join the [Dart announce][] group.
 
 * **Deprecated**: The `Service.getIsolateID` method.
 
+#### `dart:ffi`
+
+* [Changed `NativeCallable.nativeFunction` so calls now throw an error if
+  the receiver is already closed][53311], instead of returning `nullptr`.
+
 #### `dart:io`
 
 * [Eliminated trailing whitespace from HTTP headers][53005].
+* [Inserted a space at the fold point of folded header values][53227]
+  that `HttpClientResponse.headers` and `HttpRequest.headers` return.
 
 #### `dart:js_interop`
 
 * **Experimental** **Removed**: `JSNumber.toDart` in favor of `toDartDouble` and
   `toDartInt`.
 * **Experimental** **Removed**: `Object.toJS` in favor of `Object.toJSBox.`
+* **Experimental**: Restricted external JS interop APIs using `dart:js_interop`
+  to a set of allowed types.
+* **Experimental**: Prohibited use of `isNull` and `isUndefined` on dart2wasm.
+* **Experimental**: Changed `typeofEquals` and `instanceof` APIs to both return
+  bool instead of `JSBoolean`.
+  Also, `typeofEquals` now takes `String` instead of `JSString`.
+* **Experimental**: Changed `JSAny` and `JSObject` types to only implementable,
+  not extendable, by user `@staticInterop` types.
+* **Experimental**: Changed `JSArray.withLength` to take `int` instead of `JSNumber`.
 
 ### Tools
 {: .no_toc}
 
-#### Dart Dev Compiler (DDC) and Dart2js
+#### Development JavaScript compiler (DDC)
+
+* [Added interceptors for JavaScript `Symbol` and `BigInt` types][53106];
+  they should no longer be used with `package:js` classes.
+
+#### Production JavaScript compiler (dart2js)
 
 * [Added interceptors for JavaScript `Symbol` and `BigInt` types][53106];
   they should no longer be used with `package:js` classes.
 
+#### Analyzer
+
+* **Language versioned**: [Private final field promotion][2020] might cause the following
+  analyzer warnings to trigger on existing code that previously passed analysis:
+  
+  * [`unnecessary_non_null_assertion`](/tools/diagnostic-messages#unnecessary_non_null_assertion)
+  * [`invalid_null_aware_operator`](/tools/diagnostic-messages#invalid_null_aware_operator)
+  * [`unnecessary_cast`](/tools/diagnostic-messages#unnecessary_cast)
+
+  ```dart
+  class C {
+    final num? _x = null;
+
+    void test() {
+      if (_x != null) {
+        print(_x! * 2); // unnecessary_non_null_assertion
+        print(_x?.abs()); // invalid_null_aware_operator
+      }
+      if (_x is int) {
+        print((_x as int).bitLength); // unnecessary_cast
+      }
+    }
+  }
+  ```
 
 [53167]: https://github.com/dart-lang/sdk/issues/53167
+[52121]: https://github.com/dart-lang/sdk/issues/52121
 [52801]: https://github.com/dart-lang/sdk/issues/52801
+[53311]: https://github.com/dart-lang/sdk/issues/53311
 [53005]: https://github.com/dart-lang/sdk/issues/53005
+[53227]: https://github.com/dart-lang/sdk/issues/53227
 [53106]: https://github.com/dart-lang/sdk/issues/53106
+[2020]: https://github.com/dart-lang/language/issues/2020
 
 
-{% comment %}
-Create new section from these headers for each release.
-If no changes exist in a section (e.g. Language, `dart:async`, etc.),
-don't include the section header.
-
-## Released in x.x.x
-
-### Language
-{: .no_toc}
-
-### Libraries
-{: .no_toc}
-
-#### (`dart:core`, `package:js`, etc)
-
-### Tools
-{: .no_toc}
-
-#### (Dart VM, Pub, Linter, `dart2js`, etc)
-{% endcomment %}
-
 ## Released in 3.1.0
 
 ### Libraries