recovery: erase nanoapps on factory reset

Erase nanoapps in PostWipeData()

avc:  denied  { search } for  pid=312 comm="recovery" name="nanohub" dev="sysfs" ino=18838 scontext=u:r:recovery:s0 tcontext=u:object_r:sysfs_nanoapp_cmd:s0 tclass=dir permissive=0
avc:  denied  { open } for  pid=312 comm="recovery" path="/sys/devices/virtual/nanohub/nanohub/erase_shared" dev="sysfs" ino=18868 scontext=u:r:recovery:s0 tcontext=u:object_r:sysfs_nanoapp_cmd:s0 tclass=file permissive=0
avc:  denied  { write } for  pid=313 comm="recovery" name="erase_shared" dev="sysfs" ino=18868 scontext=u:r:recovery:s0 tcontext=u:object_r:sysfs_nanoapp_cmd:s0 tclass=file permissive=0

Bug: 28868735
Change-Id: I7059a7fda7a2b15837121e5cf08463c2ecb0879e
Signed-off-by: Ben Fennema <fennema@google.com>
5 files changed