Roll Flutter Engine from 60e861dfe6b1 to 39bfce213a4f (3 revisions) (#136272)

https://github.com/flutter/engine/compare/60e861dfe6b1...39bfce213a4f

2023-10-10 skia-flutter-autoroll@skia.org Roll Skia from c634411c51e6 to f0653c4a2df5 (1 revision) (flutter/engine#46716)
2023-10-10 30870216+gaaclarke@users.noreply.github.com [Impeller] made window size parametric in playground/golden tests (flutter/engine#46682)
2023-10-10 skia-flutter-autoroll@skia.org Roll Skia from c497dae2fedb to c634411c51e6 (1 revision) (flutter/engine#46714)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jsimmons@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 419b9a2..b6df6e8 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-60e861dfe6b176fa692eeb48ef3c97fcd0b7f713
+39bfce213a4f8c4c5ec41f480c21c93b7ac089b9