Bump protobuf-java from 3.21.5 to 3.21.6 (#4116)

Summary:
Bumps [protobuf-java](https://github.com/protocolbuffers/protobuf) from 3.21.5 to 3.21.6.
<details>
<summary>Commits</summary>
<ul>
<li><a href="24487dd104"><code>24487dd</code></a> Updating version.json and repo version numbers to: 21.6</li>
<li><a href="d88266c319"><code>d88266c</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10545">#10545</a> from deannagarcia/21.x</li>
<li><a href="cd0ee8f45d"><code>cd0ee8f</code></a> Apply patch</li>
<li><a href="ea2f20498e"><code>ea2f204</code></a> Uninstall system protobuf to prevent version conflicts (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10522">#10522</a>)</li>
<li><a href="aafacb09c7"><code>aafacb0</code></a> Remove broken use_bazel.sh (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10511">#10511</a>)</li>
<li><a href="40847c7ee5"><code>40847c7</code></a> Fix Kokoro tests to work on Monterey machines (<a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10473">#10473</a>)</li>
<li><a href="2fb33f46a6"><code>2fb33f4</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10382">#10382</a> from protocolbuffers/21.x-202208092202</li>
<li><a href="29f03e04d3"><code>29f03e0</code></a> Update version.json to: 21.6-dev</li>
<li><a href="638779f353"><code>638779f</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/protocolbuffers/protobuf/issues/10380">#10380</a> from protocolbuffers/21.x-202208091710</li>
<li>See full diff in <a href="https://github.com/protocolbuffers/protobuf/compare/v3.21.5...v3.21.6">compare view</a></li>
</ul>
</details>
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Pull Request resolved: https://github.com/facebook/flipper/pull/4116

Reviewed By: antonk52

Differential Revision: D39933610

Pulled By: antonk52

fbshipit-source-id: ee93fe9bb176c473199b1c9deee30bdc850ae1c6

build.gradle

@@ -104,7 +104,7 @@ ext.deps = [
         okhttp3            : 'com.squareup.okhttp3:okhttp:4.9.3',
         leakcanary         : 'com.squareup.leakcanary:leakcanary-android:1.6.3',
         leakcanary2        : 'com.squareup.leakcanary:leakcanary-android:2.8.1',
-        protobuf           : 'com.google.protobuf:protobuf-java:3.21.5',
+        protobuf           : 'com.google.protobuf:protobuf-java:3.21.6',
         testCore           : 'androidx.test:core:1.4.0',
         testRules          : 'androidx.test:rules:1.4.0',
         // Plugin dependencies