Roll Flutter Engine from 38895fbd9468 to 1b20752e2a63 (1 revision) (#138020)

https://github.com/flutter/engine/compare/38895fbd9468...1b20752e2a63

2023-11-07 skia-flutter-autoroll@skia.org Roll Skia from 51b8c1cc715a to 62fc1374cc5d (1 revision) (flutter/engine#47755)

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 bdero@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

-38895fbd946857ae4208ffb98f59cf62b30683dc
+1b20752e2a636de3a85c7a2d0d93efbd9f264a40