Cleanup getSystemService

Author: Goooler

app/src/main/java/com/github/kr328/clash/BaseActivity.kt

@@ -8,6 +8,7 @@ import android.os.Bundle
 import android.view.View
 import androidx.activity.result.contract.ActivityResultContract
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.getSystemService
 import com.github.kr328.clash.common.compat.isAllowForceDarkCompat
 import com.github.kr328.clash.common.compat.isLightNavigationBarCompat
 import com.github.kr328.clash.common.compat.isLightStatusBarsCompat
@@ -90,9 +91,8 @@ abstract class BaseActivity<D : Design<*>> : AppCompatActivity(),
         super.onCreate(savedInstanceState)
         applyDayNight()
 
-        // Apply excludeFromRecents setting to all app tasks
-        val am = getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
-        am.appTasks.forEach { task ->
+        // Apply excludeFromRecents setting to all app tasks.
+        checkNotNull(getSystemService<ActivityManager>()).appTasks.forEach { task ->
             task.setExcludeFromRecents(uiStore.hideFromRecents)
         }