Roll Flutter Engine from b2d07388ceb6 to 20034a8d62c4 (7 revisions) (#125001)

https://github.com/flutter/engine/compare/b2d07388ceb6...20034a8d62c4

2023-04-17 godofredoc@google.com Reland  "Migrate mac_host_engine to engine v2 builds." (flutter/engine#41279)
2023-04-17 41930132+hellohuanlin@users.noreply.github.com [rotation_distortion] Use "delayed swap" solution to reduce rotation distortion (flutter/engine#40730)
2023-04-17 akash.mercer@gmail.com null check added to avoid NPE while calling FlutterView.detachFromFlutterEngine() (flutter/engine#41082)
2023-04-17 5236035+fzyzcjy@users.noreply.github.com [Impeller] Make `DoMakeRasterSnapshot` output timeline event. (flutter/engine#41197)
2023-04-17 bdero@google.com [Impeller] Remove ContentContextOptions declarations from AnonymousContents (flutter/engine#41256)
2023-04-17 skia-flutter-autoroll@skia.org Roll Dart SDK from 786a70d8ef6b to a335e6724332 (1 revision) (flutter/engine#41278)
2023-04-17 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from atix5Ek_OOxH-uoPA... to Cy5LG4U2InaFLkJGz... (flutter/engine#41275)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from atix5Ek_OOxH to Cy5LG4U2InaF

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 jacksongardner@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

bin/internal/engine.version

-b2d07388ceb68d53eafaebf2d3f71ebe8babe3e4
+20034a8d62c43ad3340a3ac09e36d01cf1d91d67

bin/internal/fuchsia-linux.version

-atix5Ek_OOxH-uoPAtImlDrqlyi6stw7XQRXg6ByqBMC
+Cy5LG4U2InaFLkJGz3IR2Dh8iSIqlAkeU72cGahWsLgC