Add a 30s delay to signal when JS is ready to receive events

Author: Karthz

ios/VydiaRNFileUploader.m

@@ -55,12 +55,12 @@ - (void)startObserving {
     // JS side is ready to receive events; create the background url session if necessary
     // iOS will then deliver the tasks completed while the app was dead (if any)
     NSString *appGroup = nil;
-    double delayInSeconds = 0.5;
+    double delayInSeconds = 30;
     dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
     dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
         [self urlSession:appGroup];
     });
-}   
+}
 
 + (void)setCompletionHandlerWithIdentifier: (NSString *)identifier completionHandler: (void (^)())completionHandler {
     if ([BACKGROUND_SESSION_ID isEqualToString:identifier]) {