Roll Flutter Engine from 689ea4b10b17 to 7aa8521e640e (1 revision) (#145643)

https://github.com/flutter/engine/compare/689ea4b10b17...7aa8521e640e

2024-03-23 skia-flutter-autoroll@skia.org Roll Dart SDK from 4ed5b58c2cf7 to 567a19adbe9a (1 revision) (flutter/engine#51642)

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

bin/internal/engine.version

-689ea4b10b17666a352394287308ba7f953d5c21
+7aa8521e640e5acb948733b5c0927e4d0d193785