Front-end or kernel incorrectly replaces typedefs with underlying function types

[rmacnak-google]

import 'dart:mirrors';
typedef void Foo();
main() {
  print(Foo);
  print(reflectType(Foo));
}

VM frontend:

Foo
TypedefMirror on 'Foo'

Common frontend:

() => void
FunctionTypeMirror on '() -> void'

[zoechi]

Seems to be related to #31359 (#32782)