implement extendable first run experience starting with welcome page

src/main/java/io/lbry/browser/reactmodules/DaemonServiceControlModule.java

@@ -24,6 +24,11 @@ public class DaemonServiceControlModule extends ReactContextBaseJavaModule {
         return "DaemonServiceControl";
     }
 
+    @ReactMethod
+    public void startService() {
+        ServiceHelper.start(context, "", LbrynetService.class, "lbrynetservice");
+    }
+
     @ReactMethod
     public void stopService() {
         ServiceHelper.stop(context, LbrynetService.class);