[roll] Update external/github.com/flutter/flutter

external/github.com/flutter/flutter ba13239..673d56d (1 commits)
673d56d Fix test template (#22982)

Test: CQ

Change-Id: I1612e86366d9f3f8e6fa3c6c64f4f86915aa4f09
diff --git a/manifest/flutter b/manifest/flutter
index 74f6f07..2fb276f 100644
--- a/manifest/flutter
+++ b/manifest/flutter
@@ -4,7 +4,7 @@
     <project name="external/github.com/flutter/flutter"
              path="third_party/dart-pkg/git/flutter"
              remote="https://chromium.googlesource.com/external/github.com/flutter/flutter"
-             revision="ba1323929a210e5233985e4811cac9039f528f2b"/>
+             revision="673d56d1b73c6a2190bc6ac9930dea5205b90238"/>
     <project name="external/github.com/flutter/engine"
              path="third_party/flutter"
              remote="https://chromium.googlesource.com/external/github.com/flutter/engine"