Roll Flutter Engine from 768c90ee5dc7 to d78f66753332 (3 revisions) (#149011)

https://github.com/flutter/engine/compare/768c90ee5dc7...d78f66753332

2024-05-24 skia-flutter-autoroll@skia.org Roll Skia from 2ef772706cda to f2053e772e6f (1 revision) (flutter/engine#53009)
2024-05-24 skia-flutter-autoroll@skia.org Roll Dart SDK from 7809d6e332ff to 9d7324ea563a (7 revisions) (flutter/engine#53008)
2024-05-24 31859944+LongCatIsLooong@users.noreply.github.com Allow unsetting `TextStyle.height`  (flutter/engine#52940)

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 jonahwilliams@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://issues.skia.org/issues/new?component=1389291&template=1850622

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 4820f5f..5b6ad05 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-768c90ee5dc721f4189995715830e44fa29afbce
+d78f667533321e1eb5a77cd331f65ea7fd0b8aef