nicki: Revised permissions for /storage

Starts the sdcard service as per the AOSP recommended args
which helps in fixing the sdcard related CTS test cases

Change-Id: I7a2771d8f1a643faabda60d36495b16c57665a3e
nicki: enable multi user

Change-Id: Id7ae7b2ba203e00eb6b21536ec3ac45a0ae5f8cc