Roll Packages from 6cb9113 to 09533b7 (4 revisions) (flutter#173789)

flutter/packages@6cb9113...09533b7

2025-08-14 engine-flutter-autoroll@skia.org Roll Flutter from
34c2a3b to f4334d2 (18 revisions) (flutter/packages#9807)
2025-08-14 stuartmorgan@google.com Add review agent style guidelines to
.gemini/styleguide.md (flutter/packages#9805)
2025-08-13 koji.wakamiya@gmail.com [go_router_builder] Support extension
types (flutter/packages#9458)
2025-08-13 engine-flutter-autoroll@skia.org Roll Flutter from
e2a347b to 34c2a3b (41 revisions) (flutter/packages#9803)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages-flutter-autoroll
Please CC flutter-ecosystem@google.com on the revert to ensure that a
human
is aware of the problem.

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

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

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

Author: engine-flutter-autoroll

bin/internal/flutter_packages.version

@@ -1 +1 @@
-6cb9113d5fa49a35774e4582898fae3ea4aec958
+09533b7d5d66b66b75b43ec89c116312838f94a7