Add bounded GStreamer playback components to the voice host (#43244)

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## What changed

- Add a `GstAudioSink` subclass backed by a bounded mono `F32LE` playback writer, with partial writes, cancellation on speaker epoch changes, and delay accounting for queued samples and pending device output.
- Recreate the CPAL output stream and discard buffered audio when speaker controls change the epoch, preventing stale audio from surviving suppression.
- Add GStreamer dependencies, adjust Windows Bazel native-tool selection, and allow the helper handshake time to load startup-linked libraries.
- Separate installed-client tests from protocol lifecycle tests and supply native startup libraries in test packages.

## Testing

Add unit coverage for partial writes, sample accounting, suppression cancellation, stale writers, device delay, invalid samples, and stalled consumption.

GitOrigin-RevId: c48c48d2fee00659cf6f8a4039a6745385cb77cd

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This commit is contained in:

Benjamin Carlsson

2026-09-06 16:02:27 +00:00

committed by copyberry

parent ac192cd793

commit 9daf7d22ca

14 changed files with 1132 additions and 342 deletions

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