Merged Mobile implementation to Main

* Added correct object for device scaling (obj_Devices_Room_Scale) and
associated script (scr_Device_Room_Scale)
* Removed previous mobile object (obj_Devices_HUD_Dpi_Scale) and
associated scripts
* Updated mobile APK and set default orientation to Portrait

* Can switch between Mobile and Windows platform by un/commenting code
in obj_Devices_Room_Scale object and changing target platforms