- Added early check before creating a TargetPlatform object if the PlatformInfo will be found (check a static function to see if it's usable before making it)

- Changed each platform's GetTargetPlatform[s] function
#rb none
#jira UE-78692
[FYI] bob.tellez


#ROBOMERGE-SOURCE: CL 7952099 via CL 7954770
#ROBOMERGE-BOT: (v393-7951996)

[CL 7954968 by josh adams in Main branch]

Engine/Source/Developer/HTML5/HTML5TargetPlatform/Private/HTML5TargetPlatformModule.cpp

@@ -36,7 +36,7 @@ public:
 
 	virtual ITargetPlatform* GetTargetPlatform( ) override
 	{
-		if (Singleton == NULL)
+		if (Singleton == NULL && FHTML5TargetPlatform::IsUsable())
 		{
 			// finally, make the interface object
 			Singleton = new FHTML5TargetPlatform();