Roll Dart SDK from ade4dae923f3 to 16ddfe8d08e0 (1 revision) (flutter#43634)

https://dart.googlesource.com/sdk.git/+log/ade4dae923f3..16ddfe8d08e0

2023-07-13 [email protected] Version 3.1.0-307.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC [email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter Engine: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: skia-flutter-autoroll

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': 'ade4dae923f3e5ce8846072c4bf4c98b910cd905',
+  'dart_revision': '16ddfe8d08e09eb529112bc78ac4dcae7e1fdfd3',
 
   # 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_third_party

@@ -1,4 +1,4 @@
-Signature: 7b9215d39a578c8eec3c1473fcc3452a
+Signature: 28f3d38d110f51b67e3777c18492d67f
 
 ====================================================================================================
 LIBRARY: angle