Roll Flutter Engine from 920874bf2c1a to 8742f1c61a4c (2 revisions) (#143385)

https://github.com/flutter/engine/compare/920874bf2c1a...8742f1c61a4c

2024-02-13 skia-flutter-autoroll@skia.org Roll Dart SDK from 105312b80125 to 04caefbfa60f (1 revision) (flutter/engine#50600)
2024-02-13 skia-flutter-autoroll@skia.org Roll Skia from aaed347b2dbb to 30bba7419898 (7 revisions) (flutter/engine#50599)

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

-920874bf2c1a9ba2e9b7260b79ede8f1e26ea4f0
+8742f1c61a4c861aa360c0080234ab7d043a26ba