Roll Flutter Engine from 2ed159a786ef to e51d4f1e285a (2 revisions) (#143624)

https://github.com/flutter/engine/compare/2ed159a786ef...e51d4f1e285a

2024-02-17 robert.ancell@canonical.com Connect signals in swapped form. (flutter/engine#50705)
2024-02-17 jason-simmons@users.noreply.github.com Restore use of the API 34 device in the Firebase Test Lab script and handle FTL infrastructure errors in the script (flutter/engine#50735)

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://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

-2ed159a786ef6c256c783275ab4428b325880291
+e51d4f1e285a2dbf19e9c48b6436b6f51d6148d3