Add more missing returns (#32503)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/19d74f5929fdb533bf7e032816145ed755cf2aa7
diff --git a/commits.json b/commits.json
index c0a7c95..7e20b2c 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"760fea25cf41aa2541f29a3123eabacd92a5a204",
-  "external/github.com/flutter/flutter":"069303d46fee7cc995c2ebcf253f7c5a87ab9533",
+  "external/github.com/flutter/flutter":"19d74f5929fdb533bf7e032816145ed755cf2aa7",
   "sdk":"2fd1021326d7f2c6da68017f90e6e6523c615e05"
 }
\ No newline at end of file