[Android Apps and Games] JoLander:
Here are the results (performed in an ADB shell):

thea:/ # mount
rootfs on / type rootfs (ro,seclabel,relatime)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,size=437024k,nr_inodes=109256,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
proc on /proc type proc (rw,relatime,gid=3009,hidepid=2)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
/sys/kernel/debug on /sys/kernel/debug type debugfs (rw,seclabel,relatime)
none on /acct type cgroup (rw,relatime,cpuacct)
tmpfs on /mnt type tmpfs (rw,seclabel,relatime,size=437024k,nr_inodes=109256,mode=755,gid=1000)
none on /config type configfs (rw,relatime)
none on /dev/memcg type cgroup (rw,relatime,memory)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
none on /dev/bfqio type cgroup (rw,relatime,bfqio)
/dev/block/mmcblk0p40 on /system type ext4 (ro,seclabel,noatime,data=ordered)
/dev/block/mmcblk0p42 on /data type f2fs (rw,seclabel,nosuid,nodev,noatime,nodiratime,background_gc=on,user_xattr,inline_xattr,acl,inline_data,nobarrier,active_
logs=6)
/dev/block/mmcblk0p41 on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,nodiratime,data=ordered)
/dev/block/mmcblk0p22 on /fsg type ext4 (ro,context=u:object_r:firmware_file:s0,nosuid,nodev,noatime,nobarrier)
/dev/block/mmcblk0p1 on /firmware type ext4 (ro,context=u:object_r:firmware_file:s0,nosuid,nodev,noatime,nobarrier,data=ordered)
/dev/block/mmcblk0p30 on /persist type ext4 (rw,seclabel,nosuid,nodev,relatime,data=ordered)
/dev/block/loop0 on /pds type ext3 (rw,seclabel,relatime,errors=remount-ro,data=ordered)
tmpfs on /storage type tmpfs (rw,seclabel,relatime,size=437024k,nr_inodes=109256,mode=755,gid=1000)
/dev/block/loop1 on /su type ext4 (rw,seclabel,noatime,data=ordered)
/dev/block/loop1 on /system/xbin/su type ext4 (rw,seclabel,noatime,data=ordered)
/dev/block/loop1 on /system/xbin/su type ext4 (rw,seclabel,noatime,data=ordered)
/dev/block/loop1 on /su/bin/su type ext4 (rw,seclabel,noatime,data=ordered)
/dev/block/mmcblk1p2 on /data/sdext2 type ext4 (rw,seclabel,relatime,data=ordered)
/data/media on /mnt/runtime/default/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023,multiuser)
/data/media on /storage/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023,multiuser)
/data/media on /mnt/runtime/read/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023,multiuser)
/data/media on /mnt/runtime/write/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023,multiuser)
/dev/block/vold/public:179_65 on /mnt/media_rw/C682-5580 type vfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=
0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
/mnt/media_rw/C682-5580 on /mnt/runtime/default/C682-5580 type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /storage/C682-5580 type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /mnt/runtime/read/C682-5580 type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /mnt/runtime/write/C682-5580 type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /storage/emulated/0/DCIM type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /mnt/runtime/default/emulated/0/DCIM type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /mnt/runtime/read/emulated/0/DCIM type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
/mnt/media_rw/C682-5580 on /mnt/runtime/write/emulated/0/DCIM type sdcardfs (rw,nosuid,nodev,noexec,noatime,uid=1023,gid=1023)
thea:/ # mkdir /data/sdext2/test
thea:/ # ls -la /data/sdext2
total 30
drwxrwxrwx 10 system system 2048 2016-11-29 15:58 .
drwxrwx--x 46 system system 4096 2016-11-29 15:50 ..
drwxrwxrwx 3 system system 2048 2016-11-29 14:26 .folders
drwxrwxrwx 4 system system 2048 2016-11-29 14:17 Android
drwxrwxrwx 3 system system 2048 2016-11-29 14:24 apk
drwxrwxrwx 3 system system 2048 2016-11-29 14:24 app-lib
drwxrwxrwx 2 system system 2048 2016-11-29 14:17 dalvik-cache
drwxrwxrwx 3 system system 2048 2016-11-29 14:24 data
drwx------ 2 root root 2048 2016-11-29 14:57 lost+found
drwx------ 2 root root 2048 2016-11-29 15:58 test
thea:/ # /data/data/in.co.pricealert.apps2sd/app_binary/setfacl -Rm u::rwx,g::rwx,o:rx /data/sdext2/test
thea:/ # ls -la /data/sdext2
total 30
drwxrwxrwx 10 system system 2048 2016-11-29 15:58 .
drwxrwx--x 46 system system 4096 2016-11-29 15:50 ..
drwxrwxrwx 3 system system 2048 2016-11-29 14:26 .folders
drwxrwxrwx 4 system system 2048 2016-11-29 14:17 Android
drwxrwxrwx 3 system system 2048 2016-11-29 14:24 apk
drwxrwxrwx 3 system system 2048 2016-11-29 14:24 app-lib
drwxrwxrwx 2 system system 2048 2016-11-29 14:17 dalvik-cache
drwxrwxrwx 3 system system 2048 2016-11-29 14:24 data
drwx------ 2 root root 2048 2016-11-29 14:57 lost+found
drwxrwxr-x 2 root root 2048 2016-11-29 15:58 test
thea:/ #

Joe