Roll Flutter Engine from 503584615fd7 to 101396fd3b82 (2 revisions) (#139847)

https://github.com/flutter/engine/compare/503584615fd7...101396fd3b82

2023-12-08 matanlurey@users.noreply.github.com Roll `buildroot`, deleting `colorama`. (flutter/engine#48854)
2023-12-08 skia-flutter-autoroll@skia.org Roll Dart SDK from feb35ba49cd7 to 9acc6e29b779 (1 revision) (flutter/engine#48853)

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 chinmaygarde@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

-503584615fd7979dc77e1ecd7e5cf1b3e753c3e6
+101396fd3b8216acea95f09fa7c3fc8e97b38ab8