## Why
The Rust GStreamer bindings link GLib's GIO library even when none of the selected plugins imports it. Following only plugin dependencies can omit a library the bindings need.
## What changed
- Export `gio-2.0` pkg-config metadata in the voice SDK.
- Require GIO as a runtime dependency root on Linux, macOS, and Windows, including its transitive dependencies under the existing import checks.
- Reject runtime packages that omit the required GIO library.
## Testing
Extend fixtures to cover GIO inclusion and missing-library rejection across platforms, loading GIO and its transitive dependency after moving a Linux runtime, and resolving `gio-2.0` through pkg-config after moving an SDK.
GitOrigin-RevId: d12e45d387d56c54d94d788cf07d82bb22c2b4a3
## What changed
- Add an optional `--runtime` input to `assemble_package.py`.
- Validate the runtime receipt, target, source manifest, plugin inventory, paths,
and file hashes before copying only the declared runtime files.
- Preserve each platform's runtime layout and record the copied files and
`runtime.json` in the package manifest.
- Recheck hashes after copying and remove the new output if assembly fails.
## Testing
Add package assembly tests for Linux, macOS, and Windows layouts, invalid
receipts and paths, modified inputs, symlinked directories, and copy-time
changes.
GitOrigin-RevId: 8c9609af8ced406926707b2b0e1dcd6d2251f94b
