helpful error on canOpenURL for missing scheme (#23535)

Summary:
iOS 9 introduced a whitelist for schemes that apps are allowed to open / check against, the current behavior of React Native is to simple return `NO` when a scheme is missing from that whitelist. It would be more helpful to throw an error with a suggested fix for the problem:
```
Unable to open URL: asos://checkout, add asos to LSApplicationQueriesSchemes in Info.plist.
```

[iOS] [Changed] - canOpenURL throws when custom scheme isn't in LSApplicationQueriesSchemes.
Pull Request resolved: #23535

Differential Revision: D14143005

Pulled By: cpojer

fbshipit-source-id: 4ead5f073690e627b4a4bbe3fa5a6cb5af46b589

Libraries/LinkingIOS/RCTLinkingManager.m

@@ -106,13 +106,23 @@ - (void)handleOpenURLNotification:(NSNotification *)notification
     return;
   }
 
-  // TODO: on iOS9 this will fail if URL isn't included in the plist
-  // we should probably check for that and reject in that case instead of
-  // simply resolving with NO
-
   // This can be expensive, so we deliberately don't call on main thread
   BOOL canOpen = [RCTSharedApplication() canOpenURL:URL];
-  resolve(@(canOpen));
+
+  NSString *scheme = [URL scheme];
+
+  // On iOS 9 and above canOpenURL returns NO without a helpful error.
+  // Check if a custom scheme is being used, and if it exists in LSApplicationQueriesSchemes
+  if (![[scheme lowercaseString] hasPrefix:@"http"] && ![[scheme lowercaseString] hasPrefix:@"https"]) {
+    NSArray *querySchemes = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"LSApplicationQueriesSchemes"];
+    if (querySchemes != nil && ([querySchemes containsObject:scheme] || [querySchemes containsObject:[scheme lowercaseString]])) {
+      resolve(@(canOpen));
+    } else {
+      reject(RCTErrorUnspecified, [NSString stringWithFormat:@"Unable to open URL: %@. Add %@ to LSApplicationQueriesSchemes in your Info.plist.", URL, scheme], nil);
+    }
+  } else {
+    resolve(@(canOpen));
+  }
 }
 
 RCT_EXPORT_METHOD(getInitialURL:(RCTPromiseResolveBlock)resolve