Roll Flutter Engine from 03c5f016e919 to 7dc51b85a634 (1 revision) (#139829)

https://github.com/flutter/engine/compare/03c5f016e919...7dc51b85a634

2023-12-08 john@johnmccutchan.com Add a new external texture type to Android embedder (flutter/engine#48803)

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

-03c5f016e919bef3c6d29e986438715f3353cd1c
+7dc51b85a634675d242ece50fc7695cfd1afc479