fix why local timezone message is never logged (#3638)

Author: charlotteliang

Firebase/Messaging/FIRMessagingContextManagerService.m

@@ -44,6 +44,8 @@
 NSString *const kFIRMessagingContextManagerSoundKey = kFIRMessagingContextManagerNotificationKeyPrefix @"sound";
 NSString *const kFIRMessagingContextManagerContentAvailableKey =
     kFIRMessagingContextManagerNotificationKeyPrefix @"content-available";
+NSString *const kFIRMessagingAPNSPayloadKey = @"aps";
+
 
 typedef NS_ENUM(NSUInteger, FIRMessagingContextManagerMessageType) {
   FIRMessagingContextManagerMessageTypeNone,
@@ -187,6 +189,11 @@ + (NSDictionary *)parseDataFromMessage:(NSDictionary *)message {
         continue;
       } else if ([keyString hasPrefix:kContextManagerPrefixKey]) {
         continue;
+      } else if ([keyString isEqualToString:kFIRMessagingAPNSPayloadKey]) {
+        // Local timezone message is scheduled with FCM payload. APNS payload with
+        // content_available should be ignored and not passed to the scheduled
+        // messages.
+        continue;
       }
     }
     data[[key copy]] = message[key];