[iOS Player] Refactor and rewrite

[hrasadi]

Refactor iOS code

Also there are various strange behaviors that should be fixed during refacotring:

• [iOS] Check iOS playback continuity when network switches #3 (Connectivity)
• Continuing playback after phone calls
• Strange cases when playback starts without opening the app (probably a saved state)
• Deregister the system player when user stops playing
• Continue in background even when no program is playing
• Add support for multi-policy status update
• Bug that shows negative values for program countdown in some cases.

Now that we played with swift and know a little bit more, we should investigate and find OO design best practices in swift and organize this code (which is a released POC in reality).