Roll Flutter (stable) from c07f78888884 to 2ad6cd72c040 (5 revisions) (#3426)

Roll Flutter (stable) from c07f78888884 to 2ad6cd72c040 (5 revisions)
diff --git a/.ci/flutter_stable.version b/.ci/flutter_stable.version
index 0f118a2..7849359 100644
--- a/.ci/flutter_stable.version
+++ b/.ci/flutter_stable.version
@@ -1 +1 @@
-c07f7888888435fd9df505aa2efc38d3cf65681b
+2ad6cd72c040113b47ee9055e722606a490ef0da