Bump jnigen from 0.9.3 to 0.10.0 in /experimental/pedometer (#2351)

Bumps [jnigen](https://github.com/dart-lang/native/tree/main/pkgs) from
0.9.3 to 0.10.0.
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experimental/pedometer/pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
 
 dev_dependencies:
   ffigen: ^12.0.0
-  jnigen: ^0.9.0
+  jnigen: ^0.10.0
   flutter_test:
     sdk: flutter
   flutter_lints: ^4.0.0