Support ARM 32 and 64 bits in app bundles

https://dart.googlesource.com/external/github.com/flutter/flutter/+/90f38907d70481970046652c61565f896f40595b
diff --git a/commits.json b/commits.json
index c43d32a..f90fe6f 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"760fea25cf41aa2541f29a3123eabacd92a5a204",
-  "external/github.com/flutter/flutter":"c2a93bd545205666abb260d7b41ee337359b3a57",
+  "external/github.com/flutter/flutter":"90f38907d70481970046652c61565f896f40595b",
   "sdk":"2fd1021326d7f2c6da68017f90e6e6523c615e05"
 }
\ No newline at end of file