Vendor wgpu-hal 29.0.4 and i-slint-renderer-skia 1.17.1, unmodified

The Android develop view reads its frame back through memory (TD-1)
because wgpu's Vulkan swapchain never pre-rotates, and a portrait window
on this tablet's landscape panel then tears. The fix is a small patch to
each of these two crates, and this commit is only the ground it lands on:
both are byte-for-byte the crates.io sources the lockfile already
resolved, so the commits that follow are the patch and nothing else.

third_party/ is excluded from the workspace, or every path dependency
under the root would become a member and `--workspace` would test and
lint upstream code as ours. The README says how to carry the patches
across a Slint or wgpu bump, which matters because a stale version here
does not fail the build — cargo just warns and uses the unpatched crate.

third_party/wgpu-hal-29.0.4/src/dynamic/surface.rs

@@ -0,0 +1,72 @@
+use alloc::boxed::Box;
+use core::time::Duration;
+
+use crate::{
+    DynDevice, DynFence, DynResource, DynSurfaceTexture, Surface, SurfaceConfiguration,
+    SurfaceError,
+};
+
+use super::DynResourceExt as _;
+
+#[derive(Debug)]
+pub struct DynAcquiredSurfaceTexture {
+    pub texture: Box<dyn DynSurfaceTexture>,
+    /// The presentation configuration no longer matches
+    /// the surface properties exactly, but can still be used to present
+    /// to the surface successfully.
+    pub suboptimal: bool,
+}
+
+pub trait DynSurface: DynResource {
+    unsafe fn configure(
+        &self,
+        device: &dyn DynDevice,
+        config: &SurfaceConfiguration,
+    ) -> Result<(), SurfaceError>;
+
+    unsafe fn unconfigure(&self, device: &dyn DynDevice);
+
+    unsafe fn acquire_texture(
+        &self,
+        timeout: Option<Duration>,
+        fence: &dyn DynFence,
+    ) -> Result<DynAcquiredSurfaceTexture, SurfaceError>;
+
+    unsafe fn discard_texture(&self, texture: Box<dyn DynSurfaceTexture>);
+}
+
+impl<S: Surface + DynResource> DynSurface for S {
+    unsafe fn configure(
+        &self,
+        device: &dyn DynDevice,
+        config: &SurfaceConfiguration,
+    ) -> Result<(), SurfaceError> {
+        let device = device.expect_downcast_ref();
+        unsafe { S::configure(self, device, config) }
+    }
+
+    unsafe fn unconfigure(&self, device: &dyn DynDevice) {
+        let device = device.expect_downcast_ref();
+        unsafe { S::unconfigure(self, device) }
+    }
+
+    unsafe fn acquire_texture(
+        &self,
+        timeout: Option<Duration>,
+        fence: &dyn DynFence,
+    ) -> Result<DynAcquiredSurfaceTexture, SurfaceError> {
+        let fence = fence.expect_downcast_ref();
+        unsafe { S::acquire_texture(self, timeout, fence) }.map(|ast| {
+            let texture = Box::new(ast.texture);
+            let suboptimal = ast.suboptimal;
+            DynAcquiredSurfaceTexture {
+                texture,
+                suboptimal,
+            }
+        })
+    }
+
+    unsafe fn discard_texture(&self, texture: Box<dyn DynSurfaceTexture>) {
+        unsafe { S::discard_texture(self, texture.unbox()) }
+    }
+}