Function lv_theme_default_init

pub unsafe extern "C" fn lv_theme_default_init(
    disp: *mut _lv_display_t,
    color_primary: lv_color_t,
    color_secondary: lv_color_t,
    dark: bool,
    font: *const _lv_font_t,
) -> *mut _lv_theme_t