Add Application State Check

• Adds a check to make sure the delegate is only called if the app is in focus (and not just in the background)

Author: Nightsd01

iOS_SDK/OneSignalSDK/Source/OneSignal.m

@@ -1761,7 +1761,9 @@ + (void)setLastnonActiveMessageId:(NSString*)value { _lastnonActiveMessageId = v
 + (OSNotificationDisplayType)displayTypeForNotificationPayload:(NSDictionary *)payload {
     var type = self.inFocusDisplayType;
 
-    if (![OneSignalHelper isOneSignalPayload:payload])
+    // check to make sure the app is in focus and it's a OneSignal notification
+    if (![OneSignalHelper isOneSignalPayload:payload]
+        || UIApplication.sharedApplication.applicationState != UIApplicationStateActive)
         return type;
 
     let osPayload = [OSNotificationPayload parseWithApns:payload];

iOS_SDK/OneSignalSDK/UnitTests/UnitTests.m

@@ -2302,6 +2302,8 @@ - (void)testOverrideNotificationDisplayType {
 
     [OneSignal setInFocusDisplayType:OSNotificationDisplayTypeNone];
 
+    UIApplicationOverrider.currentUIApplicationState = UIApplicationStateActive;
+    
     [UnitTestCommonMethods resumeApp];
     [UnitTestCommonMethods runBackgroundThreads];