Roll Flutter Engine from 962d78e0ae9c to 3d76ba6d6d5f (1 revision) (#128645)

https://github.com/flutter/engine/compare/962d78e0ae9c...3d76ba6d6d5f

2023-06-10 jonahwilliams@google.com [Impeller] Fix vulkan gradient nan issue. (flutter/engine#42715)

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 jacksongardner@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

bin/internal/engine.version

-962d78e0ae9c576a3b775939864922075be34f29
+3d76ba6d6d5fd91d69ec3e55d056a731cd5dc1d1