Manual roll Flutter (stable) from 367f9ea16bfa to 12fccda59847 (2 rev…

…isions) (flutter#4976)

Manual roll requested by dit@google.com

flutter/flutter@367f9ea...12fccda

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

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

.ci/flutter_stable.version

@@ -1 +1 @@
-367f9ea16bfae1ca451b9cc27c1366870b187ae2
+12fccda598477eddd19f93040a1dba24f915b9be