Android support by default

I want this targets, but NDK is not installed on CI
```toml
# Target platforms to build apps for (Rust target-triple syntax)
targets = [
"aarch64-linux-android",
"x86_64-linux-android",
]
```

Start by tracing the repository's CI and target-toolchain setup to find where Android targets are configured and where the NDK requirement is handled. Check how the listed Rust targets are built in CI, then define completion as those targets building successfully by default without the current missing-NDK failure.

Written by the indexing model from the issue text.