Bump core from 0.14.0 to 0.15.0 (#3407)

Summary:
Bumps [core](https://github.com/facebook/screenshot-tests-for-android) from 0.14.0 to 0.15.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/facebook/screenshot-tests-for-android/releases">core's releases</a>.</em></p>
<blockquote>
<h2>0.15.0</h2>
<p><code>cdb5bd3</code> RIP Python2
<code>37feaf0</code> Add option to allow bundling before pull for large folders</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/facebook/screenshot-tests-for-android/blob/main/CHANGELOG.md">core's changelog</a>.</em></p>
<blockquote>
<h2>0.15.0 (Feb 2 2022)</h2>
<ul>
<li>Python 3 support</li>
<li>Added option to specify pulling a <code>tar</code> bundle instead of individual files via <code>bundleResults</code>. This is useful for reducing the time it takes to pull a large amount of screenshots. It will also help if you experience ADB connection flakiness.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="cb7cbc2777"><code>cb7cbc2</code></a> 0.15.0</li>
<li><a href="e035a8cbe3"><code>e035a8c</code></a> Ensure sample uses py3</li>
<li><a href="52c2ce1091"><code>52c2ce1</code></a> Ensure images are converted to RGB for diff checking + add image size check</li>
<li><a href="4651d84c9b"><code>4651d84</code></a> assertEquals -&gt; assertEqual</li>
<li><a href="4f33788404"><code>4f33788</code></a> Fix dangling file handles</li>
<li><a href="f088bf8549"><code>f088bf8</code></a> Upgrade publish plugin + Dokka</li>
<li><a href="a69a7ac52b"><code>a69a7ac</code></a> Upgrade AGP + Kotlin</li>
<li><a href="6d7b43f088"><code>6d7b43f</code></a> Upgrade Gradle</li>
<li><a href="1f7a4a73a9"><code>1f7a4a7</code></a> Expose options at plugin to allow tarring the images before adb pull</li>
<li><a href="f22eab67ea"><code>f22eab6</code></a> Update ktfmt component on FBS:master</li>
<li>Additional commits viewable in <a href="https://github.com/facebook/screenshot-tests-for-android/compare/0.14.0...0.15.0">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=com.facebook.testing.screenshot:core&package-manager=gradle&previous-version=0.14.0&new-version=0.15.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

 ---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `dependabot rebase` will rebase this PR
- `dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `dependabot merge` will merge this PR after your CI passes on it
- `dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `dependabot cancel merge` will cancel a previously requested merge and block automerging
- `dependabot reopen` will reopen this PR if it is closed
- `dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/3407

Reviewed By: passy

Differential Revision: D34050575

Pulled By: mweststrate

fbshipit-source-id: b326e4ed5b43345649bae11e861a0bc2cbb51481

build.gradle

@@ -67,7 +67,7 @@ ext.deps = [
         // First-party
         soloader           : 'com.facebook.soloader:soloader:0.10.3',
         fbjni              : 'com.facebook.fbjni:fbjni:0.3.0',
-        screenshot         : 'com.facebook.testing.screenshot:core:0.14.0',
+        screenshot         : 'com.facebook.testing.screenshot:core:0.15.0',
         boltsTasks         : 'com.parse.bolts:bolts-tasks:1.4.0',
         websocket          : 'org.java-websocket:Java-WebSocket:1.5.2',
         // Annotations