SWDEV-513810 - APU: memory allocations threshold 0.75-->1

Needs further debugging but for now can test the change

Need to verify if this fixes all the below issues-
SWDEV-512754, SWDEV-511675, SWDEV-511055, SWDEV-504085, SWDEV-499503
Also verify original issues
SWDEV-471863, SWDEV-490991

Change-Id: Ic845f851de1b98e8ed9aa0f07afddec3858119e9

rocclr/device/pal/palmemory.cpp

@@ -119,7 +119,7 @@ bool Memory::create(Resource::MemoryType memType, Resource::CreateParams* params
       const Pal::GpuMemoryHeapProperties& invisibleHeap = dev().GetGpuHeapInvisible();
       Pal::gpusize totalAlloc = dev().TotalAlloc();
       if (invisibleHeap.logicalSize > 0 && memType == Local &&
-          (totalAlloc > (invisibleHeap.logicalSize * 0.75))) {
+          (totalAlloc > invisibleHeap.logicalSize)) {
         memType = RemoteUSWC;
       }
     }