feat: running foreground service on mobile (#261)

ui/flutter/android/app/src/main/AndroidManifest.xml

@@ -72,6 +72,12 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <!-- Add android:stopWithTask option only when necessary. -->
+        <service 
+            android:name="com.pravera.flutter_foreground_task.service.ForegroundService"
+            android:stopWithTask="true" />
+
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
         <meta-data