Update to latest flutter dev (#485)
diff --git a/Dockerfile b/Dockerfile
index abc1d82..6cea0ec 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
# The specific commit that dart-services should use. This should be kept
# in sync with the flutter submodule in the dart-services repo.
# (run `git rev-parse HEAD` from the flutter submodule to retrieve this value.
-ARG FLUTTER_COMMIT=67826bdce54505760fe83b7ead70bdb5af6fe9f2
+ARG FLUTTER_COMMIT=4049889d9eecc8fb3eda316a5c371eeb636b2ae5
# We install unzip and remove the apt-index again to keep the
# docker image diff small.
diff --git a/flutter b/flutter
index 67826bd..4049889 160000
--- a/flutter
+++ b/flutter
@@ -1 +1 @@
-Subproject commit 67826bdce54505760fe83b7ead70bdb5af6fe9f2
+Subproject commit 4049889d9eecc8fb3eda316a5c371eeb636b2ae5