Avoid crash caused by flutterImageView be null (#34395)

https://dart.googlesource.com/external/github.com/flutter/engine/+/07fe96cd4666d01dcaf1f7435559e291e16cb2dd
diff --git a/commits.json b/commits.json
index 0846830..d7ecf27 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
-  "external/github.com/flutter/engine":"d441d7964b0c997ad1268b401ba605b6b51cc6d8",
+  "external/github.com/flutter/engine":"07fe96cd4666d01dcaf1f7435559e291e16cb2dd",
   "external/github.com/flutter/flutter":"c6ccf0df051554d4d7ca36f83df699d00d774c5c",
   "sdk":"ecba15b64164d271dbb0734c19610faf645f866c"
 }
\ No newline at end of file