Bug: 4070557
Change-Id: I027f76cff6df90e9909711cb81fbd17db95233c1

/data/security is another location that policy
files can reside. In fact, these policy files
take precedence over their rootfs counterparts
under certain circumstances. Give the appropriate
players the rights to read these policy files.

Change-Id: I9951c808ca97c2e35a9adb717ce5cb98cda24c41

Creates 2 new types:
- asec_apk_file : files found under /mnt/asec
                  when the asec images are mounted
- asec_image_file : the actual encrypted apks under
                    /data/app-asec

Change-Id: I963472add1980ac068d3a6d36a24f27233022832
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>