Storage categories are dynamically created from list of StorageVolumes instead
of a static XML.
Unknown files' sizes are part of Misc rather than Apps.
Categories with a size of 0 are removed.
TODO : remove the notion of a "nosdcard" product. Change strings accordingly.
See all TODO in code
Change-Id: I017ac20f5fa50ad9bdeba8e666754ec84acf3858
104ea2873d