Roll Flutter Engine from 31bbe61dfa0d to b2adf7471d3d (1 revision) (#144732)

https://github.com/flutter/engine/compare/31bbe61dfa0d...b2adf7471d3d

2024-03-06 737941+loic-sharma@users.noreply.github.com [Windows] Allow plugins to get views (flutter/engine#51096)

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 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

-31bbe61dfa0d19cb883cb7e3ab58c04127b94d4c
+b2adf7471d3d4c8193262f17ff2d357ba7fed8e8