cm: sepolicy: Remove vold external sdcard rules, moved to main sepolicy

Change-Id: I67756bad2c6e1361ecc0052003f2b4e5e4dbb007
(cherry picked from commit d553a9f8b5844580abff9b2b4c9281c3b30b6309)
selinux: Downgrade CMFM's domain

the filemanager doesn't need to be in platform_app. Put it in untrusted_app,
especially since it's a possible su client

Change-Id: I164853f2c8721d86b5b90677cb33032a3b491ff5
(cherry picked from commit ebc1c942e7754fb5615c3196279bbcf32325b924)
Add fstrim to init.d

(cherry picked from commit ddb44f62fef51cb8898e7a67bfeb4efa2a7113ef)