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Whether black-level compensation is locked to its current values, or is free to vary.
Whether the black level offset was locked for this frame. Should be ON if CaptureRequest.BlackLevelLock was ON in the capture request, unless a change in other capture settings forced the camera device to perform a black level reset.
Optional - This value may be null on some devices.
Full capability - Present on all camera devices that report being CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_FULL devices in the CameraCharacteristics.InfoSupportedHardwareLevel key