[Doing-222][iOS] Refactored XPlayerSystemBootstrap

1. Removed the process of app resource deploy, instead load
<Application_Home>/Documents/xface3/apps/helloxface directly
2. Since we have stopped supporting ‘xface_player.zip’, XSync no longer
applies，removed it.

Reference:
https://trello.com/c/tOmR8XXH
[Doing-222][iOS] Removed UsePlayerMode preference and added the Player-Related files