[iOS] validate subscription on startup only when allowed to use network

iphone/Maps/Classes/MapsAppDelegate.mm

@@ -390,7 +390,9 @@ using namespace osm_auth_ios;
   if (@available(iOS 10, *))
     [UNUserNotificationCenter currentNotificationCenter].delegate = self;
 
-  [[SubscriptionManager shared] validate];
+  if ([MWMFrameworkHelper canUseNetwork])
+    [[SubscriptionManager shared] validate];
+  
   return YES;
 }
 

iphone/Maps/Core/Framework/MWMFrameworkHelper.h

@@ -10,4 +10,6 @@
 
 + (void)createFramework;
 
++ (BOOL)canUseNetwork;
+
 @end

iphone/Maps/Core/Framework/MWMFrameworkHelper.mm

@@ -5,6 +5,7 @@
 #include "Framework.h"
 
 #include "base/sunrise_sunset.hpp"
+#include "platform/network_policy.hpp"
 
 @implementation MWMFrameworkHelper
 
@@ -66,4 +67,11 @@
 }
 
 + (void)createFramework { UNUSED_VALUE(GetFramework()); }
+
++ (BOOL)canUseNetwork
+{
+  return platform::GetCurrentNetworkPolicy().CanUse() ||
+         GetPlatform().ConnectionStatus() != Platform::EConnectionType::CONNECTION_WWAN;
+}
+
 @end