Roll Flutter Engine from 77bee011dabf to 3394b84cc5d7 (3 revisions) (#119405)

* 3d0306d97 Default to running the scenario tests on an arm iOS simulator variant on an Apple Silicon host Mac (flutter/engine#39210)

* 0b6576ff3 Roll Dart SDK from 135f4c51c9ff to f9583e13e214 (2 revisions) (flutter/engine#39221)

* 3394b84cc Roll Fuchsia Mac SDK from 11wOrGFBXTHgxQVOi... to 1TFy9RSFMfNy7JpQU... (flutter/engine#39223)
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index c829bea..1e77907 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-77bee011dabf09a3b2a290cb16a4ba899f7cf537
+3394b84cc5d7de6ad74484fa61df56b939efae53
diff --git a/bin/internal/fuchsia-mac.version b/bin/internal/fuchsia-mac.version
index fc6b7bc..de14f9c 100644
--- a/bin/internal/fuchsia-mac.version
+++ b/bin/internal/fuchsia-mac.version
@@ -1 +1 @@
-11wOrGFBXTHgxQVOiDlM2QZI8AFL0idY8lOPNYDs7wMC
+1TFy9RSFMfNy7JpQUSiekID2aKH0A48Rh4ZhsnBsPqYC