Refine Firebase remote config

mobile/src/main/scala/com/github/shadowsocks/BaseService.scala

@@ -126,6 +126,7 @@ trait BaseService extends Service {
 
   def connect() {
     profile.name = profile.getName  // save original name before it's (possibly) overwritten by IP addresses
+
     if (profile.host == "198.199.101.152") {
       val client = new OkHttpClient.Builder()
         .dns(hostname => Utils.resolve(hostname, enableIPv6 = false) match {
@@ -353,7 +354,7 @@ trait BaseService extends Service {
         .put("PrimaryDNS", new JSONArray().put(makeDns("Primary", "119.29.29.29")))
         .put("AlternativeDNS", remoteDns)
       case _ => config
-        .put("PrimaryDNS", new JSONArray(remoteDns))
+        .put("PrimaryDNS", remoteDns)
         // no need to setup AlternativeDNS in Acl.ALL/BYPASS_LAN mode
         .put("OnlyPrimaryDNS", true)
     }

mobile/src/main/scala/com/github/shadowsocks/MainActivity.scala

@@ -384,12 +384,14 @@ class MainActivity extends Activity with ServiceBoundContext with Drawer.OnDrawe
         displayFragment(new AboutFragment)
       case DRAWER_FAQ => launchUrl(getString(R.string.faq_url))
       case DRAWER_CUSTOM_RULES => displayFragment(new CustomRulesFragment)
+      case _ => // ignore
     }
     true  // unexpected cases will throw exception
   }
 
   protected override def onResume() {
     super.onResume()
+    app.remoteConfig.fetch()
     state match {
       case State.STOPPING | State.CONNECTING =>
       case _ => hideCircle()

mobile/src/main/scala/com/github/shadowsocks/ShadowsocksApplication.scala

@@ -148,6 +148,7 @@ class ShadowsocksApplication extends Application {
     checkChineseLocale(getResources.getConfiguration)
 
     FirebaseApp.initializeApp(this)
+	remoteConfig.setDefaults(R.xml.default_configs);
     remoteConfig.fetch().addOnCompleteListener(task => if (task.isSuccessful) remoteConfig.activateFetched())
 
     JobManager.create(this).addJobCreator(DonaldTrump)