drop rmt_storage

* E/rmt_storage( 3538): Remote storage service is not supported on mdm target

Change-Id: I63992d3bec9d7bce08451416e1d75d230a14b47d
SELinux: misc policy updates

* Fix denials after updates from Sony Kitkat firmware

Change-Id: I140d871c041afa0751c6212312eaaccaa7be91b7