android-media-playback-cameralisted

# Android Media Playback and Camera (Media3 + CameraX) ## Core Principles - Create the ExoPlayer in `onStart`, release it in `onStop` — never leak a player across configuration changes. - CameraX use cases are bound to a `LifecycleOwner`; let the library manage start/stop automatically. - Always request CAMERA and RECORD_AUDIO permissions before binding CameraX use cases. See **android-permissions-device-apis**. - Save captured media through MediaStore, not raw file paths — scoped storage makes direct paths unreliable on Android 10+. - Background audio requires a `MediaSessionService` and a foreground notification; plain coroutines in the background are killed. --- ## Gradle Dependencies ```kotlin // libs.versions.toml [versions] media3 = "1.3.1" camerax = "1.3.3" [libraries] media3-exoplayer = { module = "androidx.media3:media3-exoplayer", version.ref = "media3" } media3-ui = { module = "androidx.media3:media3-ui", version.ref = "media3" } media3-session = { module = "androidx.media3:media3-session", version.ref = "media3" } camerax-core = { module = "androidx.camera:camera-core", version.ref = "camerax" } camerax-camera2 = { module = "androidx.camera:camera-camera2", version.ref = "camerax" } camerax-lifecycle = { module = "androidx.camera:camera-lifecycle", version.ref = "camerax" } camerax-view = { module = "androidx.camera:camera-view", version.ref = "c