Bump jnigen from 0.6.0 to 0.7.0 in /experimental/pedometer (#2016)

Bumps [jnigen](https://github.com/dart-lang/jnigen) from 0.6.0 to 0.7.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/jnigen/releases">jnigen's releases</a>.</em></p>
<blockquote>
<h2>package:jnigen v0.7.0</h2>
<ul>
<li><strong>Breaking Change</strong> (<a href="https://redirect.github.com/dart-lang/jnigen/issues/387">#387</a>): Added <code>JBuffer</code> and <code>JByteBuffer</code> classes as default classes for <code>java.nio.Buffer</code> and <code>java.nio.ByteBuffer</code> respectively.</li>
<li><strong>Breaking Change</strong>: Made the type classes <code>final</code>.</li>
<li>Added <code>ignore_for_file: lines_longer_than_80_chars</code> to the generated file preamble.</li>
<li>Added an explicit cast in generated <code>&lt;Interface&gt;.implement</code> code to allow <code>dart analyze</code> to pass when <code>strict-casts</code> is set.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="4443cebdd3"><code>4443ceb</code></a> Add <code>JBuffer</code>, <code>JByteBuffer</code> to enable fast copying to and from <code>Uint8List</code> (...</li>
<li><a href="7c837763be"><code>7c83776</code></a> Add <code>ignore_for_file: lines_longer_than_80_chars</code> to generated files (<a href="https://redirect.github.com/dart-lang/jnigen/issues/386">#386</a>)</li>
<li><a href="49d4ac04a5"><code>49d4ac0</code></a> Add correct cast to interface method invocation (<a href="https://redirect.github.com/dart-lang/jnigen/issues/385">#385</a>)</li>
<li><a href="b845ff1610"><code>b845ff1</code></a> Specify JDK min and max version in README (<a href="https://redirect.github.com/dart-lang/jnigen/issues/384">#384</a>)</li>
<li><a href="ef458e3b01"><code>ef458e3</code></a> jni-0.6.1 fix number of topics (<a href="https://redirect.github.com/dart-lang/jnigen/issues/382">#382</a>)</li>
<li><a href="eba06738a4"><code>eba0673</code></a> Bump actions/checkout from 3.5.3 to 3.6.0 (<a href="https://redirect.github.com/dart-lang/jnigen/issues/381">#381</a>)</li>
<li>See full diff in <a href="https://github.com/dart-lang/jnigen/compare/jnigen-v0.6.0...jnigen-v0.7.0">compare view</a></li>
</ul>
</details>
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experimental/pedometer/pubspec.yaml

@@ -16,7 +16,7 @@ dependencies:
 
 dev_dependencies:
   ffigen: ^9.0.0
-  jnigen: ^0.6.0
+  jnigen: ^0.7.0
   flutter_test:
     sdk: flutter
   flutter_lints: ^2.0.0