Android 10.0 SystemUI 屏蔽状态栏消息推送弹出的悬浮通知

在状态栏中，有一些通知类似 消息推送 弹出的 悬浮通知，弹出30秒之后会消失掉 要想屏蔽掉这些通知，首选知道这些通知是怎么产生的

通知类型
NotificationContentInflater.java 详细的介绍各种通知的类型
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationContentInflater.java

 /**
     * The default, contracted view.  Seen when the shade is pulled down and in the lock screen
     * if there is no worry about content sensitivity.
     */
    public static final int FLAG_CONTENT_VIEW_CONTRACTED = 1;

    /**
     * The expanded view.  Seen when the user expands a notification.
     */
    public static final int FLAG_CONTENT_VIEW_EXPANDED = 1