add preconnect audio buffer API to LocalAudioTrack #1410

Job	Run time
Generating protobuf	19s
Make RTC sdist	13s
Build RTC wheels (aarch64)	1m 10s
Build RTC wheels (x86_64)	1m 0s
Build RTC wheels (x86_64 arm64)	1m 10s
Build RTC wheels (AMD64)	1m 35s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	32s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	41s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	38s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	50s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	36s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 39s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	44s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	38s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	40s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	34s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 20s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	57s
Publish RTC release	0s
docs	0s
	15m 16s

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