UX monitor: test BA and BAF to disable re-acquiring UX payloads

src/burn/engine/engine.mc

@@ -1314,5 +1314,5 @@ MessageId=706
 Severity=Warning
 SymbolicName=MSG_UX_PAYLOAD_MISSING
 Language=English
-UX payload deletion was detected. Payload Id '%1!ls!'. Payload Path '%2!ls!'. action '%3!ls!'.
+UX payload deletion was detected, Id: '%1!ls!', path: '%2!ls!', action: %3!ls!.
 .

src/test/burn/TestBA/TestBA.cs

@@ -589,6 +589,11 @@ protected override void OnUnregisterBegin(UnregisterBeginEventArgs args)
             this.Log("OnUnregisterBegin, default: {0}, requested: {1}", args.RecommendedRegistrationType, args.RegistrationType);
         }
 
+        protected override void OnUxPayloadDeleted(UxPayloadDeletedEventArgs args)
+        {
+            args.Action = BOOTSTRAPPER_UXPAYLOADDELETED_ACTION.None;
+        }
+
         private void TestVariables()
         {
             // First make sure we can check and get standard variables of each type.

src/test/burn/TestData/PrereqBaTests/PrereqBaf/PrereqBaf.cpp

@@ -26,7 +26,17 @@ class CPrereqBaf : public CBalBaseBAFunctions
         return hr;
     }
 
-private:
+    virtual STDMETHODIMP OnUxPayloadDeleted(
+        __in_z LPCWSTR /*wzPayloadId*/,
+        __in_z LPCWSTR /*wzPayloadPath*/,
+        __in BOOTSTRAPPER_UXPAYLOADDELETED_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_UXPAYLOADDELETED_ACTION* pAction
+        )
+    {
+        *pAction = BOOTSTRAPPER_UXPAYLOADDELETED_ACTION_NONE;
+
+        return S_OK;
+    }
 
 public:
     //