ADB 获取当前activity信息

借鉴：https://blog.csdn.net/wangjicong_215/article/details/79744599

8.1之前

window 通过adb shell dumpsys activity | findstr “mFocus”
Linux 通过adb shell dumpsys activity | grep “mFocus”

8.1之后

window 通过adb shell dumpsys activity | findstr “mResume”

Linux 通过adb shell dumpsys activity | grep “mResume”