Unhide zoom API.

const char CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION[] = "max-exposure-compensation";

const char CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION[] = "min-exposure-compensation";

const char CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP[] = "exposure-compensation-step";

const char CameraParameters::KEY_ZOOM[] = "zoom";

const char CameraParameters::KEY_MAX_ZOOM[] = "max-zoom";

const char CameraParameters::KEY_ZOOM_RATIOS[] = "zoom-ratios";

const char CameraParameters::KEY_ZOOM_SUPPORTED[] = "zoom-supported";

const char CameraParameters::KEY_SMOOTH_ZOOM_SUPPORTED[] = "smooth-zoom-supported";

// Values for white balance settings.

const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto";

    // 0.3333, EV is -2.

    // Example value: "0.333333333" or "0.5". Read only.

    static const char KEY_EXPOSURE_COMPENSATION_STEP[];

    // Current zoom value.

    // Example value: "0" or "6". Read/write.

    static const char KEY_ZOOM[];

    // Maximum zoom value.

    // Example value: "6". Read only.

    static const char KEY_MAX_ZOOM[];

    // The zoom ratios of all zoom values. The zoom ratio is in 1/100

    // increments. Ex: a zoom of 3.2x is returned as 320. The number of list

    // elements is KEY_MAX_ZOOM + 1. The first element is always 100. The last

    // element is the zoom ratio of zoom value KEY_MAX_ZOOM.

    // Example value: "100,150,200,250,300,350,400". Read only.

    static const char KEY_ZOOM_RATIOS[];

    // Whether zoom is supported. Zoom is supported if the value is "true". Zoom

    // is not supported if the value is not "true" or the key does not exist.

    // Example value: "true". Read only.

    static const char KEY_ZOOM_SUPPORTED[];

    // Whether if smooth zoom is supported. Smooth zoom is supported if the

    // value is "true". It is not supported if the value is not "true" or the

    // key does not exist.

    // See CAMERA_CMD_START_SMOOTH_ZOOM, CAMERA_CMD_STOP_SMOOTH_ZOOM, and

    // CAMERA_MSG_ZOOM in frameworks/base/include/camera/Camera.h.

    // Example value: "true". Read only.

    static const char KEY_SMOOTH_ZOOM_SUPPORTED[];

    // Values for white balance settings.

    static const char WHITE_BALANCE_AUTO[];