Roll Flutter Engine from 7a31543b4630 to 6e8e55ef1a7f (4 revisions) (#138761)

https://github.com/flutter/engine/compare/7a31543b4630...6e8e55ef1a7f

2023-11-20 matanlurey@users.noreply.github.com Silence a lint in `common/settings.h` in order to turn on `clang_tidy`. (flutter/engine#48239)
2023-11-20 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from LnToEykA8o68jv58K... to Q3HcTitDF90ZOPWDa... (flutter/engine#48244)
2023-11-20 skia-flutter-autoroll@skia.org Roll Skia from 2bcc2e8682a6 to c9943f14039f (1 revision) (flutter/engine#48243)
2023-11-20 matanlurey@users.noreply.github.com Make `vulkan/...` compatible with `.clang_tidy`. (flutter/engine#48240)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from LnToEykA8o68 to Q3HcTitDF90Z

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 jonahwilliams@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

-7a31543b463056f24e8d5595b392246d74047939
+6e8e55ef1a7f714f5316afa9c94805ce57b6dd68

bin/internal/fuchsia-linux.version

-LnToEykA8o68jv58KK__qkkikDLpUI4MCKQUqKv2dRkC
+Q3HcTitDF90ZOPWDam_v6bIKuSA_s6MT71sg96GTulQC