[Fix] (DirectVulkan): stop loading and carrying dead default-framebuffer content

- EGL swap semantics make the presented colour buffer's content undefined at
  its next acquire (EGL_BUFFER_DESTROYED, the implementation default) and
  every ancillary depth/stencil buffer's content undefined after ANY swap,
  yet the default-FBO render pass reloaded both with LOAD_OP_LOAD every
  frame; SwapchainObject now tracks per-image content validity (defined when
  a pass stores into the attachment, invalidated at present) and the
  render-pass manager turns an undefined attachment's tile load into
  LOAD_OP_DONT_CARE with initialLayout=UNDEFINED, keyed into both hashes so
  the cached LOAD variants cannot be hit by mistake
- the default framebuffer's depth attachment is now attached ON DEMAND: a
  draw with depth test and stencil test both disabled (GL: a disabled test
  neither reads nor writes its buffer), and no pending depth/stencil clear,
  resolves to a depth-less pass flavour, dropping the D24S8 tile load AND
  store outright - MC 26.2 renders its GUI into its own FBO and only ever
  blits colour to the default framebuffer, so its swapchain pass carried a
  full-screen depth round-trip for nothing
- the flavour only escalates: an active depth-full pass absorbs depth-less
  draws unchanged, while a depth-using draw against a depth-less pass
  resolves to an incompatible entry and splits, its depth loading DONT_CARE
  (the content was undefined all along); the depth-less flavour is folded
  into ComputeHash and the per-draw fast-path memo so the two flavours can
  never alias

MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp

@@ -4427,11 +4427,19 @@ void main() {
                     static_cast<Int>(transitionedResource->layout));
         }
 
-        auto* renderPassEntry = &m_renderPassManager->GetOrCreateRenderPass(*drawFbo, m_imageIndexAcquired);
+        // Depth/stencil participation of THIS draw, for the default-FBO depth-less
+        // pass flavor (GL: a disabled depth/stencil test neither reads nor writes
+        // its buffer).
+        const Bool drawUsesDepthStencil =
+            MG_State::pGLContext->IsCapabilityEnabled(CapabilityInput::DepthTest) ||
+            MG_State::pGLContext->IsCapabilityEnabled(CapabilityInput::StencilTest);
+        auto* renderPassEntry =
+            &m_renderPassManager->GetOrCreateRenderPass(*drawFbo, m_imageIndexAcquired, drawUsesDepthStencil);
         if (activeRenderPass && !activeRenderPass->CompatibleWith(*renderPassEntry)) {
             VkRenderPassManager::EndRenderPass(frame.commandBuffer);
             activeRenderPass = nullptr;
-            renderPassEntry = &m_renderPassManager->GetOrCreateRenderPass(*drawFbo, m_imageIndexAcquired);
+            renderPassEntry =
+                &m_renderPassManager->GetOrCreateRenderPass(*drawFbo, m_imageIndexAcquired, drawUsesDepthStencil);
         }
         if (renderPassEntry->attachmentCount == 0 || renderPassEntry->extent.x() <= 0 || renderPassEntry->extent.y() <= 0) {
             MGLOG_D("SetupDraw skipped: drawFbo=%u resolved to an empty render pass (attachmentCount=%u extent=%dx%d)",
@@ -5453,7 +5461,10 @@ void main() {
                         "TryBlitToDefaultFramebufferWithShader: failed to create sampled view for textureId=%d mip=%u",
                         sourceTexture->GetExternalIndex(), srcBinding.mipLevel);
 
-        auto& renderPassEntry = m_renderPassManager->GetOrCreateRenderPass(drawFbo, m_imageIndexAcquired);
+        // A color-only blit never touches depth/stencil: let the default-FBO pass
+        // it opens skip the depth attachment (depth-less flavor).
+        auto& renderPassEntry =
+            m_renderPassManager->GetOrCreateRenderPass(drawFbo, m_imageIndexAcquired, /*drawUsesDepthStencil=*/false);
         const Bool ok = VkRenderPassManager::BeginRenderPass(frame.commandBuffer, renderPassEntry);
         MOBILEGL_ASSERT(ok, "%s: BeginRenderPass failed", __func__);
 
@@ -7696,6 +7707,13 @@ void main() {
             result = VK_SUCCESS;
         }
         VK_VERIFY(result, "Present, vkQueuePresentKHR");
+        // EGL swap semantics: the presented color buffer's content is undefined the
+        // next time this image is acquired (EGL_BUFFER_DESTROYED, the default swap
+        // behaviour), and EVERY ancillary depth/stencil buffer's content is
+        // undefined after any swap. The render-pass manager turns the undefined
+        // attachments' next tile loads into LOAD_OP_DONT_CARE.
+        m_swapchainObject.SetImageContentDefined(m_imageIndexAcquired, false);
+        m_swapchainObject.SetAllDepthStencilContentUndefined();
         // The authoritative check, done here - after the frame is presented, before the next
         // acquire. This is what makes a launcher-side resolution change take effect: shrinking
         // the window's buffer (SurfaceHolder.setFixedSize) moves currentExtent, the swapchain