CameraX VideoCapture<Recorder> wired alongside Preview + ImageCapture
in a single bindToLifecycle call. Mirrors the iOS surface contract:
startVideoRecording(handle, snapshotOrientation) → null
Records to a UUID-named MP4 in cacheDir. Audio enabled iff the
instance was created with enableAudio: true AND RECORD_AUDIO has
been granted (no SecurityException if the user denied mic but
asked for audio — recording proceeds silent). targetRotation set
per-call so the file's rotation metadata matches how the device
was held at recording start.
stopVideoRecording(handle) → {path}
Resolves when CameraX delivers the VideoRecordEvent.Finalize.
Telegram-fidelity mirror: VideoCapture.Builder.setMirrorMode(MIRROR_MODE_OFF)
overrides CameraX's default MIRROR_MODE_ON_FRONT_ONLY so selfie
videos record the raw sensor feed ("as others see you"). Preview-side
mirror stays a CameraX-managed SurfaceTexture transform; the recorded
file is independent.
Quality: Quality.HD (720p) — keeps file sizes reasonable for chat
composer use and well within mid-range Android devices' budget for
binding all three use cases (Preview + ImageCapture + VideoCapture).
Fallback for devices that reject the 3-use-case bind would be next
iteration.
instance.dispose() now hard-cancels any in-flight recording (drops
file, no caller waiting) — matches iOS' recorder.cancel() path.
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