Fix notificationmgr coverity issue

:Release Notes:
Fix coverity issue

:Detailed Notes:
CID-9529035 Use of 32-bit time_t

:Testing Performed:
Build successful & tested locally

:QA Notes:
N/A

:Issues Addressed:
[WRP-15556] Fix static issue of notificationmgr in OSE

Change-Id: I511dfb3e783a19acec9fa98aaa0e4b5039d63739

src/Settings.h.in

@@ -1,4 +1,4 @@
-// Copyright (c) 2013-2020 LG Electronics, Inc.
+// Copyright (c) 2013-2023 LG Electronics, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -58,7 +58,7 @@ public:
 	static bool cbSystemSettingsStatusNotification(LSHandle* lshandle, LSMessage *message, void *user_data);
 
 private:
-	uint32_t m_disableToastTimestamp;
+        time_t m_disableToastTimestamp;
 	int m_thresholdTimer;
 	int m_retentionPeriod;
 	std::vector<std::string> m_notificationAggregator;