Fuchsia device is ephemeral. (#53717)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/587b622396110444492943a74bb7c0cdcf4b3fa2
diff --git a/commits.json b/commits.json
index 0b33c78..5e9593a 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"f7c6c6d92a126e5ad2a45bd28c6aa1ee1195a281",
-  "external/github.com/flutter/flutter":"7e97ca60779e8dc12d047a0b54486989ae84d43a",
+  "external/github.com/flutter/flutter":"587b622396110444492943a74bb7c0cdcf4b3fa2",
   "sdk":"43079207d4b6e5b7954b29cc43747bd7a6595176"
 }
\ No newline at end of file