unlink() equals remove() in this situation can cause data loss and filesystem corruption if some data is not sync when mount sdcard

Change-Id: Ib3ad32842fcbf3b058c986df6901c7744bd5cf1f
Shrink cid

Change-Id: I00556341b746f186f424ebe46c94fd02f10e6536
v6036

Change-Id: I7e70d0e2e367f703fe420d4300eb5fecdc247099
Fix issue where android device manager, etc, dont actually wipe data.

--wipe_data issues via /cache/recovery/command will now completely format data.

All other manual wipe commands will preserve data on /data/media.
There is another mounts/storage option that will do a true data format.

Change-Id: Ie8ecd2b0e14c3bb1d8a404ea868cdf703455d2ab