chore(tests): move UIApplication+OneSignal from OneSIgnal > OneSignalInAppMessages

* This extension on `UIApplication` is only used in the `OneSignalInAppMessages` framework, so there is no need to keep it in the umbrella `OneSignalFramework` framework, which causes errors if only `OneSignalInAppMessages` is tested (without also importing OneSignalFramework).

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignal.xcodeproj/project.pbxproj

@@ -2581,8 +2581,6 @@
 				CA1A6E6820DC2E31001C41B9 /* OneSignalDialogController.m */,
 				CA1A6E6D20DC2E73001C41B9 /* OneSignalDialogRequest.h */,
 				CA1A6E6E20DC2E73001C41B9 /* OneSignalDialogRequest.m */,
-				DE20425C24E21C1500350E4F /* UIApplication+OneSignal.h */,
-				DE20425D24E21C2C00350E4F /* UIApplication+OneSignal.m */,
 			);
 			name = Categories;
 			sourceTree = "<group>";
@@ -2975,6 +2973,8 @@
 				DEBAAE4C2A42157B00BF2C1C /* UI */,
 				DEBAAE2A2A4211DA00BF2C1C /* OneSignalInAppMessages.h */,
 				DEBAAE982A42179A00BF2C1C /* OneSignalInAppMessages.m */,
+				DE20425C24E21C1500350E4F /* UIApplication+OneSignal.h */,
+				DE20425D24E21C2C00350E4F /* UIApplication+OneSignal.m */,
 				DEBAAE962A42178800BF2C1C /* OSInAppMessagingDefines.h */,
 				3C14E39E2AFAE39B006ED053 /* PrivacyInfo.xcprivacy */,
 			);

iOS_SDK/OneSignalSDK/OneSignalInAppMessages/Controller/OSMessagingController.m

@@ -26,8 +26,8 @@
  */
 
 #import "OSMessagingController.h"
-#import "UIApplication+OneSignal.h" // Previously imported via "OneSignalHelper.h"
-#import "NSDateFormatter+OneSignal.h" // Previously imported via "OneSignalHelper.h"
+#import "UIApplication+OneSignal.h"
+#import "NSDateFormatter+OneSignal.h"
 #import <OneSignalCore/OneSignalCore.h>
 #import "OSInAppMessageClickResult.h"
 #import "OSInAppMessageClickEvent.h"

iOS_SDK/OneSignalSDK/Source/UIApplication+OneSignal.h renamed to iOS_SDK/OneSignalSDK/OneSignalInAppMessages/UIApplication+OneSignal.h

@@ -31,7 +31,6 @@ of this software and associated documentation files (the "Software"), to deal
 #import "OneSignalCommonDefines.h"
 #import "OneSignalTracker.h"
 #import <OneSignalLocation/OneSignalLocationManager.h>
-#import "UIApplication+OneSignal.h"
 
 @implementation OneSignalLifecycleObserver