[Keyboard Manager] Enable App-specific shortcuts in the KBM backend (#4628)

* Enable app specific shortcut remapping

* Fixed lowercase function call

* Add test file

* Moved GetForegroundProcess to II and added tests

* Fixed runtime error while testing due to heap allocation across dll boundary

* Renamed function

* Remove unused code

* Changed process checking step to include substrings

* Changed back to exact match included match without file extension

src/modules/keyboardmanager/common/InputInterface.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "windows.h"
+#include <string>
 
 // Interface used to wrap keyboard input library methods
 class InputInterface
@@ -10,4 +11,7 @@ public:
 
     // Function to get the state of a particular key
     virtual bool GetVirtualKeyState(int key) = 0;
+
+    // Function to get the foreground process name
+    virtual void GetForegroundProcess(_Out_ std::wstring& foregroundProcess) = 0;
 };