fix: Move main-activity request for Android only

Author: VladimirAmiorkov

sdk/app/app.ts

@@ -2,7 +2,6 @@ import "./bundle-config";
 import application = require("tns-core-modules/application");
 import fresco = require("nativescript-fresco");
 application.setCssFileName("./app.css");
-require("./main-activity.android.ts");
 
 //partial declaration of Fresco native android class
 declare module com {
@@ -21,6 +20,7 @@ declare module com {
 
 
 if (application.android) {
+    require("./main-activity.android.ts");
     application.on("launch", (intent) => {
         fresco.initialize();
     });