VK: Fix memory corruption in VulkanExternalImageManager (#9116)

When calling setExternalSamplerVkSet the recycle
function lambda captured some variables allocated
on the stack, which are out of scope by the time
the function is called.

Change the capture to be done by value instead of
by ref to avoid this problem.

filament/backend/src/vulkan/VulkanExternalImageManager.cpp

@@ -191,9 +191,11 @@ void VulkanExternalImageManager::updateSetAndLayout(
         VkDescriptorSet const srcSet = oldSet != VK_NULL_HANDLE ? oldSet : set->getVkSet();
         copySet(mPlatform->getDevice(), srcSet, newSet, copyBindings);
 
-        set->setExternalSamplerVkSet(newSet, [&](VulkanDescriptorSet*) {
-            mDescriptorSetCache->manualRecycle(layout->count, newLayout, newSet);
-        });
+        set->setExternalSamplerVkSet(newSet,
+                [&descriptorSetCache = mDescriptorSetCache, layoutCount = layout->count, newLayout,
+                        newSet](VulkanDescriptorSet*) {
+                    descriptorSetCache->manualRecycle(layoutCount, newLayout, newSet);
+                });
         if (oldLayout != newLayout) {
             layout->setExternalSamplerVkLayout(newLayout);
         }