rohks 847c1252e2 Add default method durationUs(long) in TrackOutput
The method allows extractors to set track duration when available. The `default` implementation does nothing, allowing implementers of `TrackOutput` to override it if they need to handle track duration.

Implemented it in `FakeExtractor` to print track duration in dump files.

PiperOrigin-RevId: 688110288
2024-10-21 06:18:00 -07:00
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Test utils module

Provides utility classes for media unit and instrumentation tests.