This enum is used for array index of framerates for the function get_supported_vf_frame_rates() when isMaxMin is set to true
#include <camera/external_camera_api.h>
typedef enum {
CAMERA_VF_FRAMERATE_MAX_INDEX = 0,
CAMERA_VF_FRAMERATE_MIN_INDEX
} camera_vf_framerate_min_max_index_t;