Add wasm/web support to agdk/na-winit-wgpu

Firstly this updates agdk-winit-wgpu (consistent with na-winit-wgpu):
- to Gradle 9 / AGP 9.1
- icons
- wgpu 0.16 -> 29
- winit 0.28 -> 0.30

This makes na-winit-wgpu and agdk-winit-wgpu into cross-platform
examples that can run on Android, Window, Linux, macOS and Web.

Although the primary goal of the examples in this repository is to show
how to write native Rust applications for Android, it's hopefully also
helpful to see how you can write Winit + wgpu based applications that
are portable to desktop OSs and Web, in addition to Android.

It's _possible_ that these also run on iOS but I haven't had a chance to
test that.

Author: rib

agdk-winit-wgpu/.vscode/settings.json

@@ -1,3 +1,7 @@
 {
     "rust-analyzer.cargo.target": "aarch64-linux-android",
+    "editor.formatOnSave": true,
+    "[xml]": {
+        "editor.formatOnSave": false
+    }
 }