Bump jni from 0.8.0 to 0.9.0 in /experimental/pedometer (#2268)

Bumps [jni](https://github.com/dart-lang/native/tree/main/pkgs) from
0.8.0 to 0.9.0.
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experimental/pedometer/example/pubspec.yaml

@@ -41,7 +41,7 @@ dependencies:
 
   ffi: ^2.1.2
   intl: ^0.19.0
-  jni: ^0.8.0
+  jni: ^0.9.0
   fl_chart: ^0.67.0
 
 dev_dependencies:

experimental/pedometer/pubspec.yaml

@@ -10,7 +10,7 @@ dependencies:
   flutter:
     sdk: flutter
   plugin_platform_interface: ^2.1.8
-  jni: ^0.8.0
+  jni: ^0.9.0
   ffi: ^2.1.2
 
 dev_dependencies: