优化

app/src/main/AndroidManifest.xml

@@ -427,9 +427,7 @@
         <service android:name=".service.TTSReadAloudService" />
         <service android:name=".service.HttpReadAloudService" />
         <service android:name=".service.AudioPlayService" />
-        <service
-            android:name=".service.DownloadService"
-            android:exported="" />
+        <service android:name=".service.DownloadService" />
 
         <receiver
             android:name=".receiver.MediaButtonReceiver"