Roll Flutter from b8b0c807bbe5 to de7c23e7e963 (1 revision) (#5804)

diff --git a/.ci/flutter_master.version b/.ci/flutter_master.version
index 1e26cf4..1938f7f 100644
--- a/.ci/flutter_master.version
+++ b/.ci/flutter_master.version
@@ -1 +1 @@
-b8b0c807bbe54718c35d17c8df8afc712cef7ec2
+de7c23e7e963265b6b10e785f26c83ef4df9168a