Roll Flutter Engine from a2ed373fa70f to 1b842ae58b3d (1 revision) (#145565)

https://github.com/flutter/engine/compare/a2ed373fa70f...1b842ae58b3d

2024-03-21 ian@hixie.ch Add a breadcrumb from FlutterView to PlatformDispatcher. (flutter/engine#51504)

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

-a2ed373fa70fd43cd8121e3c7e59bbb5ae6917db
+1b842ae58b3d2de6f67fe55f19ae641f0330184e