Added documentation to SDLProtocol
Added documentation to SDLProtocol

Signed-off-by: NicoleYarroch <5fee00239940f883d4c2854e41c7f989e75278a3@livio.io>

kshala-ford/sdl_ios,kshala-ford/sdl_ios,APCVSRepo/sdl_ios,APCVSRepo/sdl_ios,kshala-ford/sdl_ios,kshala-ford/sdl_ios,APCVSRepo/sdl_ios,smartdevicelink/sdl_ios,smartdevicelink/sdl_ios,smartdevicelink/sdl_ios,smartdevicelink/sdl_ios,APCVSRepo/sdl_ios,APCVSRepo/sdl_ios,kshala-ford/sdl_ios,smartdevicelink/sdl_ios