Roll Flutter from 617de911982a to 3b05d806222a (2 revisions) (#4905)

diff --git a/.ci/flutter_master.version b/.ci/flutter_master.version
index 2db3814..fb28fa7 100644
--- a/.ci/flutter_master.version
+++ b/.ci/flutter_master.version
@@ -1 +1 @@
-617de911982a07d0edd484dd017fa7470e23cb1c
+3b05d806222a75a5076ffaeec4d93c95e3bb72ea