android 11.0 SystemUI手势上滑显示导航栏和隐藏导航栏

最近在11.0平板定制化开发过程中，有需求要求全屏显示，上滑显示导航栏，然后3秒钟后隐藏导航栏

1.全局手势事件监听

SystemGesturesPointerEventListener

--- a/frameworks/base/services/core/java/com/android/server/wm/DisplayPolicy.java
+++ b/frameworks/base/services/core/java/com/android/server/wm/DisplayPolicy.java
@@ -178,7 +178,7 @@ import com.android.server.policy.WindowOrientationListener;
 import com.android.server.statusbar.StatusBarManagerInternal;
 import com.android.server.wallpaper.WallpaperManagerInternal;
 import com.android.server.wm.utils.InsetUtils;
-
+import android.util.Log;