Roll Flutter Engine from 19ae46afed69 to e4a5acc14b44 (7 revisions) (#143112)

https://github.com/flutter/engine/compare/19ae46afed69...e4a5acc14b44

2024-02-07 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Roll Dart SDK from 452dd17120b7 to 322c81160fa9 (1 revision)" (flutter/engine#50450)
2024-02-07 skia-flutter-autoroll@skia.org Roll Skia from a2fe78a31a14 to eacaa2d3600c (3 revisions) (flutter/engine#50445)
2024-02-07 chinmaygarde@google.com [Impeller] Initialize the stencil reference value. (flutter/engine#50373)
2024-02-07 skia-flutter-autoroll@skia.org Roll Skia from 9b103a4148e2 to a2fe78a31a14 (2 revisions) (flutter/engine#50441)
2024-02-07 30870216+gaaclarke@users.noreply.github.com Fixed CONTRIBUTING.md markdown lints (flutter/engine#50439)
2024-02-07 skia-flutter-autoroll@skia.org Roll Skia from 7777976cd518 to 9b103a4148e2 (1 revision) (flutter/engine#50438)
2024-02-07 skia-flutter-autoroll@skia.org Roll Dart SDK from 452dd17120b7 to 322c81160fa9 (1 revision) (flutter/engine#50437)

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

-19ae46afed69f6a14c0fe63e8553f5e74fa8b80f
+e4a5acc14b442ab4b16ab1c238823d29b3922ce4