Roll Flutter from 78eb916d1516 to ea5af273dd7a (1 revision) (#1745)

diff --git a/.ci/flutter_master.version b/.ci/flutter_master.version
index fb8a902..55ded7f 100644
--- a/.ci/flutter_master.version
+++ b/.ci/flutter_master.version
@@ -1 +1 @@
-78eb916d15160a2fa9a1b27c812b7c620c27e3ae
+ea5af273dd7a4da86cd1633fae04160fd62869b0