Manual roll of Dart with fixups to zircon system.dart (#44185)

https://dart.googlesource.com/sdk.git/+log/4fd35600b477..0e02245635ea

Merge to Dart Version 3.2.0-16.0.dev

Author: a-siva

DEPS

@@ -53,7 +53,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '4fd35600b477d18b024fa1b31f42204fab2fccd0',
+  'dart_revision': '0e02245635eaf23fa5d6a62b059a90aae34fffe0',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_dart

@@ -1,4 +1,4 @@
-Signature: eca8a55f4f8e1225df85bb269749e68c
+Signature: a4dee66e7471aa133d109697527a267d
 
 ====================================================================================================
 LIBRARY: dart

shell/platform/fuchsia/dart-pkg/zircon/lib/src/system.dart

@@ -86,7 +86,8 @@ class ReadResult extends _Result {
   /// Returns the bytes as a Uint8List. If status != OK this will throw
   /// an exception.
   Uint8List bytesAsUint8List() {
-    return _bytes!.buffer.asUint8List(_bytes!.offsetInBytes, _numBytes!);
+    final lbytes = bytes;
+    return lbytes.buffer.asUint8List(lbytes.offsetInBytes, _numBytes!);
   }
 
   /// Returns the bytes as a String. If status != OK this will throw
@@ -129,7 +130,8 @@ class ReadEtcResult extends _Result {
   /// Returns the bytes as a Uint8List. If status != OK this will throw
   /// an exception.
   Uint8List bytesAsUint8List() {
-    return _bytes!.buffer.asUint8List(_bytes!.offsetInBytes, _numBytes!);
+    final lbytes = bytes;
+    return lbytes.buffer.asUint8List(lbytes.offsetInBytes, _numBytes!);
   }
 
   /// Returns the bytes as a String. If status != OK this will throw