Reflecting review comments
Reflecting review comments

- Add documentations in private functions
- Rename private functions and args
- Rename “pts” acronym
- Remove “FU” acronym in comments

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