web: use get_preferred_canvas_format()
to fill SurfaceCapabilities
#3744
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Checklist
cargo clippy
.RUSTFLAGS=--cfg=web_sys_unstable_apis cargo clippy --target wasm32-unknown-unknown
if applicable.Description
On the web, wgpu always prioritizes returning the
Bgra8Unorm
format in theformats
field ofSurfaceCapabilities
, but this format is not supported on Android devices:Testing
Tested on Android Chrome Canary 115.0.5747.0 via https://jinleili.github.io/learn-wgpu-zh/simuverse