[bug] no such method getPluginManager()

[nikoPLP]

Describe the bug

When runing the release android app, the app crashes with

java.lang.NoSuchMethodError: no non-static method ... MainActivity;.getPluginManager()Lapp/tauri/plugin/PluginManager;

Reproduction

cargo install create-tauri-app
cargo create-tauri-app --alpha
cd tauri-app
cargo tauri android init
cargo tauri android build
adb install app-universal-release.apk

Expected behavior

The problem is solved when a line is added in the file src-tauri/gen/android/app/proguard-rules.pro which is otherwise empty!!!

-keep class [your app name here].TauriActivity {
  public app.tauri.plugin.PluginManager getPluginManager();
}

There must be a bug in the build script that generates proguard-rules.pro from https://github.com/tauri-apps/tauri/blob/tauri-v2.0.0-alpha.9/core/tauri/mobile/proguard-tauri.pro

Platform and versions

[✔] Environment
    - OS: Mac OS 10.15.6 X64
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.69.0 (84c898d65 2023-04-16)
    ✔ Cargo: 1.69.0 (6e9a83356 2023-04-12)
    ✔ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔ Rust toolchain: stable-x86_64-apple-darwin (environment override by RUSTUP_TOOLCHAIN)
    - node: 16.13.1
    - pnpm: 7.15.0
    - yarn: 1.22.18
    - npm: 8.1.2

[-] Packages
    - tauri [RUST]: 2.0.0-alpha.9
    - tauri-build [RUST]: 2.0.0-alpha.5
    - wry [RUST]: 0.28.3
    - tao [RUST]: 0.19.1
    - @tauri-apps/api [NPM]: 2.0.0-alpha.4
    - @tauri-apps/cli [NPM]: 2.0.0-alpha.9

[-] App
    - build-type: bundle
    - CSP: unset
    - distDir: ../dist
    - devPath: http://localhost:1420/
    - framework: Svelte
    - bundler: Vite

Stack trace

No response

Additional context

No response

[lucasfernog]

This is a regression in the latest release. I'll open a PR to fix it.