USB: f_mass_storage: Added cdrom option to UMS-lun-devices, 2048 block size for cdrom devices

Original by: FrozenCow
https://github.com/CyanogenMod/android_kernel_samsung_aries/commit/1736943179733a4629e0eaa773848bdeeaeefec1
https://github.com/CyanogenMod/android_kernel_samsung_aries/commit/979aa0d835ddca5fdbaab47bcd9aa7f7d359feb0

This will enable true cd emulation in app that support it.

Change-Id: Ic4f80b86fb133ea33700acd75eb798cdbfd68f7a