Roll Flutter Engine from 54e5d81512c6 to 6642cfd41bd2 (1 revision) (#111518)

diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 73a03bd..1cad1a1 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-54e5d81512c6894efd8ff3ca11e0c9ec0859b16c
+6642cfd41bd2b2fd16cd48de8616154768fb378f