Handle f2fs/ext4 userdata the Lollipop way

Thanks dhacker29

Signed-off-by: Alberto97 <albertop2197@gmail.com>

Conflicts:
	BoardConfig.mk
	device.mk
	rootdir/Android.mk
	rootdir/etc/gpe-fstab.qcom
	rootdir/etc/init.qcom.rc
	rootdir/etc/init.recovery.qcom.rc
init_falcon: Remove ext4 check

Remove userdata filesystem check since it doesn't work and it breaks other variants property_set
TODO: We have to find a new way to check if device is the GPE variant

Signed-off-by: Alberto97 <albertop2197@gmail.com>