Fixes commons-app#3981 (commons-app#3983)

* Start the upload service when needed and not in the MainActivity directly

Author: ashishkumar468

app/src/main/java/fr/free/nrw/commons/contributions/MainActivity.java

@@ -111,11 +111,6 @@ protected void onSaveInstanceState(Bundle outState) {
     }
 
     private void initMain() {
-        //Do not remove this, this triggers the sync service
-        Intent uploadServiceIntent = new Intent(this, UploadService.class);
-        uploadServiceIntent.setAction(UploadService.ACTION_START_SERVICE);
-        startService(uploadServiceIntent);
-
         addTabsAndFragments();
         if (contributionsActivityPagerAdapter.getItem(0) != null) {
             ((ContributionsFragment)contributionsActivityPagerAdapter.getItem(0)).onAuthCookieAcquired();