Existing configuration files do not cover case where android kernel
is used to implement just mtp functionality using ffs based userspace
code - mtp_mode-android uses "mtp" instead of "ffs" and pc_suite-android
activates both mtp and obex support.

Add mtp_mode-android-ffs.ini that is identical with pc_suite-android.ini
except for the mode name which is "mtp" instead of "pc_suite".