[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/VkRenderPassManager.h

@@ -188,8 +188,22 @@ namespace MobileGL::MG_Backend::DirectVulkan {
         HashType ComputeHash(
             const MG_State::GLState::FramebufferObject& fbo,
             Uint32 swapchainImageIndex,
-            Bool includePendingClear = true);
-        RenderPassEntry& GetOrCreateRenderPass(const MG_State::GLState::FramebufferObject& fbo, Uint32 swapchainImageIndex);
+            Bool includePendingClear = true,
+            Bool includeDefaultFboDepthStencil = true);
+        // drawUsesDepthStencil: whether the operation about to run inside the pass
+        // reads or writes the depth/stencil buffer (depth test or stencil test
+        // enabled, or a depth/stencil clear). Only consulted for the DEFAULT
+        // framebuffer: EGL undefines its ancillary buffers at every swap, so a
+        // default-FBO pass whose draws provably never touch depth/stencil is
+        // created WITHOUT the depth attachment - on a tiler that skips the whole
+        // depth tile load AND store. The flavor only escalates: once a pass with
+        // depth is active, later depth-less draws keep using it, and a depth-using
+        // draw against a depth-less active pass resolves to a new (incompatible)
+        // entry, which the caller's compatibility check turns into a pass split;
+        // the new pass's depth loads DONT_CARE (content was undefined all along).
+        RenderPassEntry& GetOrCreateRenderPass(const MG_State::GLState::FramebufferObject& fbo,
+                                               Uint32 swapchainImageIndex,
+                                               Bool drawUsesDepthStencil = true);
         void QueueRenderbufferClear(GLbitfield mask, const ClearFramebufferPayload& clearPayload,
                                     const MG_State::GLState::FramebufferObject& drawFbo);
         void QueueRenderbufferClear(const ClearAttachmentPayload& clearPayload,
@@ -231,6 +245,10 @@ namespace MobileGL::MG_Backend::DirectVulkan {
         Uint64 m_rpFastTexEpoch = 0;
         Uint64 m_rpFastRbEpoch = 0;
         Uint64 m_rpFastRenderPassHash = 0;
+        // Whether the memoized entry carries a depth/stencil attachment; a
+        // default-FBO resolution whose effective depth request differs must
+        // miss the memo (the depth-less/depth-full flavors hash differently).
+        Bool m_rpFastHadDepthStencil = false;
 
     public:
         struct RenderbufferResource {