Roll Flutter Engine from 873449c27d5a to 49c6ca211aa4 (1 revision) (#141760)

https://github.com/flutter/engine/compare/873449c27d5a...49c6ca211aa4

2024-01-18 skia-flutter-autoroll@skia.org Roll Skia from ea70dd235e9f to 1b2909f1eac7 (1 revision) (flutter/engine#49858)

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

-873449c27d5a04a066a1854bddf044e1edd07b23
+49c6ca211aa44a45480a6a58fba079479703f199