Reverts "Roll Flutter Engine from 6fa734d68688 to 1850def2ccff (1 revision) (flutter#148507)" (flutter#148517)

Reverts: flutter#148507
Initiated by: zanderso
Reason for reverting: Engine crashers on Android following the clang roll https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_gallery__transition_perf_with_semantics/12126/overview
Original PR Author: engine-flutter-autoroll

Reviewed By: {fluttergithubbot}

This change reverts the following previous change:

flutter/engine@6fa734d...1850def

2024-05-16 [email protected] Manual roll of Clang from 725656bdd885 to 145176dc0c93 (flutter/engine#52823)

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 [email protected],[email protected],[email protected] 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:
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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: auto-submit[bot]

bin/internal/engine.version

@@ -1 +1 @@
-1850def2ccffebc4b0120c5eca45fe1a7bf562d3
+6fa734d686888a39add026a2a98d6ec311c23efb