Update ndk-sys to v0.4.1+23.1.7779620, to fix checksum failures.

[jimblandy]

This addresses CI failures like:

/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/cargo metadata --format-version=1 --manifest-path /home/runner/work/wgpu/wgpu/Cargo.toml
    Updating crates.io index
    Updating git repository `https://github.com/gfx-rs/naga`
    Updating git repository `https://github.com/grovesNL/glow/`
 Downloading crates ...
  Downloaded async-trait v0.1.57
  Downloaded cgl v0.3.2  Downloaded ndk-sys v0.4.0
error: failed to verify the checksum of `ndk-sys v0.4.0`

Checklist

• Run cargo clippy.
• Run RUSTFLAGS=--cfg=web_sys_unstable_apis cargo clippy --target wasm32-unknown-unknown if applicable.
• Add change to CHANGELOG.md. See simple instructions inside file.

Connections
Link to the issues addressed by this PR, or dependent PRs in other repositories

Description
Describe what problem this is solving, and how it's solved.

Testing
Explain how this change is tested.

[codecov-commenter]

Codecov Report

Merging #3232 (d298a15) into master (04d12ba) will decrease coverage by 0.09%.
The diff coverage is 62.12%.

@@            Coverage Diff             @@
##           master    #3232      +/-   ##
==========================================
- Coverage   64.70%   64.61%   -0.10%     
==========================================
  Files          81       81              
  Lines       38819    39479     +660     
==========================================
+ Hits        25118    25509     +391     
- Misses      13701    13970     +269     

Impacted Files	Coverage Δ
player/src/lib.rs	53.31% <ø> (ø)
wgpu-core/src/id.rs	81.25% <0.00%> (-2.63%)	⬇️
wgpu-core/src/lib.rs	96.55% <ø> (ø)
wgpu-core/src/present.rs	0.00% <0.00%> (ø)
wgpu-core/src/resource.rs	25.13% <ø> (ø)
wgpu-hal/src/dx11/device.rs	0.00% <0.00%> (ø)
wgpu-hal/src/empty.rs	0.00% <ø> (ø)
wgpu-hal/src/lib.rs	26.21% <ø> (ø)
wgpu/src/backend/direct.rs	54.80% <0.00%> (-0.30%)	⬇️
wgpu/src/lib.rs	50.33% <0.00%> (-2.49%)	⬇️
... and 43 more

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