+* The %IPackageInstallationEventListener interface defines a listener that is notified about events related to the installation or uninstallation of a package on a device.
+* The events include installation completion, uninstallation completion, and installation progress.
+* This listener is registered using the PackageManager::AddPackageInstallationEventListener() method and unregistered using the PackageManager::RemovePackageInstallationEventListener() method.
+* Generally, this listener is used in system applications such as an application service that utilizes a package's (un)installation information that is present in the system.