Support preload to writable storage

Support preload to writable storage

[Issue#] N/A
[Problem] N/A
[Cause] N/A
[Solution] Support install Preload application to a writable storage.
This is requirment of operator and preload application can be
uninstalled.
[SCMRequest] N/A

Change-Id: Ibe9af71e1560a01ea8318fc5a9ba2ef28cef5d8d