Roll Flutter Engine from b87a782ce3a3 to 187334c39b44 (2 revisions) (#140398)

https://github.com/flutter/engine/compare/b87a782ce3a3...187334c39b44

2023-12-19 skia-flutter-autoroll@skia.org Roll Skia from 22dad95c218f to 0d39fb28b32d (2 revisions) (flutter/engine#49241)
2023-12-19 skia-flutter-autoroll@skia.org Roll Skia from 6496c9c5866a to 22dad95c218f (4 revisions) (flutter/engine#49237)

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 jimgraham@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

-b87a782ce3a3ee12bb905ee7915f97d965350e49
+187334c39b44bf5dc29bfdefcbed093e86832b64