Required Shizuku app. If change other app, Auto close task in prev app. The app must be registered. This app is required Shizuku APP. Please prepare Shizuku. https://shizuku.rikka.app/ How to work: Observe current Activity From Foreground service. If change other app, Invoke remove task function. this APIs Invoke by Shizuku. that's because, using API is Internal-API. Using Permission: POST_NOTIFICATIONS: (optional) Showing notification and add stop service button. QUERY_ALL_PACKAGES: It because, Get app list from register screen. FOREGROUND_SERVICE、FOREGROUND_SERVICE_SPECIAL_USE: It because, Detect leave app by ForegroundService.