agent_playout.ts AudioFrame copy bug

[victorx98]

Describe the bug

In capture():
It didn't respect the Int16Array boundary and copy the underlying buffer directly. This will create issue if we use Buffer (minimum 8192 bytes) and use Int16Array view on PCM data less than 8192 bytes.

                for (const f of bstream.write(frame.data.buffer)) {
                  handle.pushedDuration += (f.samplesPerChannel / f.sampleRate) * 1000;
                  await this.#audioSource.captureFrame(f);
                }

Relevant log output

No response

Describe your environment

Nodejs 18, livekit agent 0.7.9

Minimal reproducible example

No response

Additional information

No response