Revert "Read dart_plugin_registrant path from FlutterProject to support non-standard path." (#107850)

* 3054307aa Windows: Reimplement ForceRedraw() using the ScheduleFrame embedder API (flutter/engine#34656)

* 0560d0a5a Bump github/codeql-action from 2.1.15 to 2.1.16 (flutter/engine#34711)

* 92606c2b5 [fuchsia][scenic] Reland Move pointer injector to embedder. (flutter/engine#34692)

* 06273515b [Fuchsia] Support scroll_*_physical_pixel fields (flutter/engine#34325)

* 93003636f Roll Skia from 7d1636010a55 to 2cf696124c82 (2 revisions) (flutter/engine#34696)

* 59e15959a Roll Skia from 2cf696124c82 to 849628568612 (1 revision) (flutter/engine#34697)

* 92b371f0c Roll Skia from 849628568612 to ed71b72e0213 (1 revision) (flutter/engine#34703)

* 499140273 Roll Dart SDK from 92c7843b2ece to 54cc31cd98db (1 revision) (flutter/engine#34704)

* e0944a3af Roll Dart SDK from 54cc31cd98db to 1b845f6a8c90 (1 revision) (flutter/engine#34705)

c29bf8fcf [Windows] Fix GDI resource leaks in the software fallback path (flutter/engine#34574) (#107754)

[flutter_tools] Migrate commands.shard/hermetic/doctor_test to null-safety and make hermetic (#107670)

Fixes a fidelity bug on desktop involving the selection toolbar not hiding when it should have.