Roll Flutter Engine from 513e007ed682 to 7e2aa68b2f27 (1 revision) (#137460)

https://github.com/flutter/engine/compare/513e007ed682...7e2aa68b2f27

2023-10-27 zanderso@users.noreply.github.com Remove //third_party/khronos (flutter/engine#47398)

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 aaclarke@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

-513e007ed6826943a24b9a7fced91f4359f3b41e
+7e2aa68b2f27c4fee9950f2a8ac7c7d05d67badb