Merge "docs: Added desc. of launcher app criteria in Q" into qt-dev am: b14d2ded

    }

    /**

     * Retrieves a list of launchable activities that match {@link Intent#ACTION_MAIN} and

     * {@link Intent#CATEGORY_LAUNCHER}, for a specified user. Result may include

     * synthesized activities like app details Activity injected by system.

     * Retrieves a list of activities that specify {@link Intent#ACTION_MAIN} and

     * {@link Intent#CATEGORY_LAUNCHER}, across all apps, for a specified user. If an app doesn't

     * have any activities that specify <code>ACTION_MAIN</code> or <code>CATEGORY_LAUNCHER</code>,

     * the system adds a synthesized activity to the list. This synthesized activity represents the

     * app's details page within system settings.

     *

     * <p class="note"><b>Note: </b>It's possible for system apps, such as app stores, to prevent

     * the system from adding synthesized activities to the returned list.</p>

     *

     * <p>As of <a href="/reference/android/os/Build.VERSION_CODES.html#Q">Android Q</a>, at least

     * one of the app's activities or synthesized activities appears in the returned list unless the

     * app satisfies at least one of the following conditions:</p>

     * <ul>

     * <li>The app is a system app.</li>

     * <li>The app doesn't request any <a href="/guide/topics/permissions/overview">permissions</a>.

     * </li>

     * <li>The <code>&lt;application&gt;</code> tag in the app's manifest doesn't contain any child

     * elements that represent

     * <a href="/guide/components/fundamentals#DeclaringComponents">app components</a>.</li>

     * </ul>

     *

     * <p>Additionally, the system hides synthesized activities for some or all apps in the

     * following enterprise-related cases:</p>

     * <ul>

     * <li>If the device is a

     * <a href="https://developers.google.com/android/work/overview#company-owned-devices-for-knowledge-workers">fully

     * managed device</a>, no synthesized activities for any app appear in the returned list.</li>

     * <li>If the current user has a

     * <a href="https://developers.google.com/android/work/overview#employee-owned-devices-byod">work

     * profile</a>, no synthesized activities for the user's work apps appear in the returned

     * list.</li>

     * </ul>

     *

     * @param packageName The specific package to query. If null, it checks all installed packages

     *            in the profile.