Always show stop button for now

Fix #940.

src/main/scala/com/github/shadowsocks/ShadowsocksNotification.scala

@@ -40,7 +40,7 @@ class ShadowsocksNotification(private val service: BaseService, profileName: Str
     .setContentIntent(PendingIntent.getActivity(service, 0, new Intent(service, classOf[Shadowsocks])
       .setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT), 0))
     .setSmallIcon(R.drawable.ic_stat_shadowsocks)
-  if (!ShadowsocksTileService.running) builder.addAction(R.drawable.ic_navigation_close,
+  builder.addAction(R.drawable.ic_navigation_close,
     service.getString(R.string.stop), PendingIntent.getBroadcast(service, 0, new Intent(Action.CLOSE), 0))
   app.profileManager.getAllProfiles match {
     case Some(profiles) => if (profiles.length > 1)

src/main/scala/com/github/shadowsocks/ShadowsocksTileService.scala

@@ -9,10 +9,6 @@ import com.github.shadowsocks.utils.{State, Utils}
 /**
   * @author Mygod
   */
-object ShadowsocksTileService {
-  var running: Boolean = _
-}
-
 @TargetApi(24)
 final class ShadowsocksTileService extends TileService with ServiceBoundContext {
   import ShadowsocksTileService._
@@ -46,15 +42,6 @@ final class ShadowsocksTileService extends TileService with ServiceBoundContext
 
   override def onServiceConnected() = callback.stateChanged(bgService.getState, bgService.getProfileName, null)
 
-  override def onCreate {
-    super.onCreate
-    running = true
-  }
-  override def onDestroy {
-    super.onDestroy
-    running = false
-  }
-
   override def onStartListening {
     super.onStartListening
     attachService(callback)