t supports as read-only system properties.</li>
</ul>

<p>To ensure an accurate comparison of features, the Android Package Manager
provides a shared set of feature constants that both applications and devices
use to declare feature requirements and support. The available feature constants
are listed in the <a href="#features-reference">Features Reference</a> tables at
the bottom of this document, and in the class documentation for <code><a href="../../../reference/android/content/pm/PackageManager.html">Pa