f235a65897a348edac7c6f2fa27cde3bbb734dfd
@jason-simmons @jiahaog fyi I need to figure out a test for this still but it seems to work. Hot restart is kind of a mess though, because `Engine::Restart` nulls out the asset manager it ends up reloading the font collection for every engine after a restart. But we separately need to fix hot restart, it's not very usable on the example app Fixes https://github.com/flutter/flutter/issues/143701
Avoid reloading font collection for spawned engines with compatible asset managers (flutter/engine#50897)
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